You now have the option to migrate presets from a previous version, export presets and to save to a directory as a zip file (great for instructors).
Preset Migration migrates your saved presets, not your preferences. The message says "Would you like to migrate presets from the following versions?" It simply carries on the preset files you have already saved (things like Brush Tips, HDR Toning presets, Curve presets, Styles etc.) to CS6.
HOW TO USE PHOTOSHOP CS6 AUTOMATED PRESET MIGRATION
Photoshop CS6 offers the great new functionality of automated preset migration for your custom presets from Photoshop versions as far back as CS3.
When Photoshop CS6 launches for the first time, it checks for previous installations of Photoshop on the computer to see if there are custom presets that need to be migrated. Photoshop looks in each of these presets folders for your saved custom preset files that it can migrate.
Preset migration script copies all the files in user preset folders of older versions. If there are more than one preset files with the same name, presets from the newer version will be given priority. These types of presets will be migrated by the script:
3DLUTs, Actions, Black and White, Brushes, Channel Mixer, Color Books, Color Swatches, Contours, Curves, Custom Shapes, Deco, Duotones, Exposure, Flash 3D, Gradients, HDR Toning, Hue and Saturation, Levels, Lighting Effects, Lights, Materials, Meshes, Optimized Colors, Optimized Output Settings, Optimized Settings, Patterns, Render Settings, Repousse, Scripts, Styles, Tools, Video, Volumes, Widgets, Zoomify, and Workspaces
If this is not your first launch and you would like Photoshop to look for presets,
Choose Edit > Presets > Migrate Presets
When Photoshop notices that you have custom presets saved in their appropriate folders it will give the message "Would you like to migrate presets from the following versions?"
Choose Yes. Photoshop will begin the preset migration script.
When the migration has completed Photoshop will pop up another message saying:
"Preset files from older versions successfully migrated"
In order to use your newly migrated presets, you must restart Photoshop.
If you had Photoshop CS6 beta installed and have saved custom presets, you will need to export those presets before uninstalling the previous version and installing the release version of Photoshop CS6.
HOW TO SAVE PRESETS
For PS, check that you have saved all your presets using:
Edit>Preset Manager... (in previous versions) Edit>Presets>Preset Manager... (in CS6)
HOW TO IMPORT AND EXPORT PRESETS
In the main PS menu,
Choose Edit > Presets > Export/Import Presets
In this dialog you can export the presets and then import them when you load the new version using the same Export/Import dialog.
If you have gone through the automated preset migration and notice that some of your presets didn't get migrated with the rest, make sure you have exported your presets to their default folders.
PRESET FILE LOCATIONS:
(Note that there are two different folder locations for presets, one for application provided default presets, and one for user created preset files)
These are the presets that are unique to each user on the computer. These can be migrated automatically: (this is the location that the user should save their personal presets in)
Windows: Users/[user name]/AppData/Roaming/Adobe/Adobe Photoshop CS6/Presets
Mac: Users/[Username]/Library/Application Support/Adobe/Adobe Photoshop CS6/Presets
These are the default presets that ship with Photoshop. These presets can be imported but will not copy over using the migrate feature because each version of Photoshop will install defaults for that version.
Windows 64 bit:
[Hard Drive]:\Program Files\Adobe\Adobe Photoshop CS6 (64 Bit)\Presets
WindowsXP and Windows7 32 bit:
[Hard Drive]:\Program Files (x86)\Adobe\Adobe Photoshop CS6\Presets
[Hard Drive]/Applications/Adobe Photoshop CS6/Presets
Frequently used preset filename extensions:
ABR Brush preset
ACO Swatch preset
ASL Style preset
ATN Action preset
CSH Custom Shape preset
GRD Gradient preset
PAT Pattern preset
SHC Contour preset
Here is a helpful tutorial: