Only with that media, or with everything? Have you tried a different project?
Yes, I have tried with a project with footage from a Canon 7D. I don't think it's media related.
Just to confirm, you've rebooted since the update?
I've been experiencing the same issues since updating to 6.0.2 across many projects and media types. To clarify, I'm having a lag when screening footage in the source monitor but only when using playback via my BlackMagic Decklink Extreme 3D card. Hitting the space bar results in a near one second delay stopping the play head. If I pop playback over to Adobe DV everything works correctly. I've installed the latest drivers for both my video and graphics cards. I'm guessing this is a BlackMagic issue and that I should just be patient.
Windows 7 Pro
6 Core Intel
i7-3930K CPU @ 3.20GHz
32 GB RAM, 64 bit OS
NVIDIA GeForce GTX 570 (v 306.23)
Blackmagic Decklink HD Extreme 3D (v 9.6.4)
Adobe Production Premium CS6 (v 6.0.2)
Avid Media Composer 6
I just tried the same as you TJ, and it also seems to be BlackMagic that is causing the problem for me.