No, I have used Photo Booth for this test just because it reliably triggers the gfx card switching from "Integrated" (Intel HD3000) to "Discrete" (AMD), which reliably makes my MBP freeze every 3rd to 5th time, without using any 3rd party software.
Ah, there we go. The integrated/discrete switching process. Yeah, I have no experience with that. IIRC Apple had some issues with it bad when it was introduced.
And, well, yea, it looks like the majority actually has no problems.
But this MBP of mine is quite new (2 months old now) and is the same model that is currently being sold. So my alarm bells are ringing here.
That sucks, sorry man. However, in support of your experience, perhaps there aren't enough users out there that both own your model of MBP *and* have installed the Lion GM. If my guess isn't too far off, we might see more reports of this problem rolling in. It just might be too early for it to be felt just yet.