Sorry, I can't answer your question (not involved in Cairngorm at all), but I'd be interested in reading your comparison; indeed, my company is considering switching to Flex, and I'm in search of a good perennial framework. I'm sure it's OK to post a link to it in this forum; maybe it'll trigger the feedback that you didn't get so far...
I heard Xavi Beumala already connected you offlist.
For the record: In contrast to earlier versions, many parts of Cairngorm 3 apply across frameworks. So if you're using Parsley, Spring ActionScript, PureMVC, Swiz, Mate or another library on your projects, Cairngorm is complementary.
I'd recommend you also take a look into Spring ActionScript and Parsley and the sample applications produced on top of various frameworks from Chris Coentraets blog; which were presented at the last MAX conference.
Good luck and let us know about your findings. We always look forward to hear any constructive criticism.
Thank you for your quick reply, Alex. Since my post yesterday, I came across quite a few comprisons (not an exhaustive list of what I had to read through...):
Because I'm looking for a non-intrusive (or loosely coupled) framework with a gentle learning curve (so that my company's current Oracle Forms developers won't immediately reject it), I'm tempted to try out Mate. And because the framework doesn't interfere with views, business logic and server access, it seems that I'll more easily be able to back out and try another one if I find out I made a mistake (something that's tougher to do with Cairngorm or PureMVC).