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I did notice that too. The reason it is choppy on those machines is because of the "Welcome to the Apple Store" software. I have used my friend's brand new MacBook Pro and it is a much different--smoother--experience.

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AH, that makes sense. But i think thats really the point. People load so much stuff all the time and leave it running using up resources. Especially when the video card is not dedicated, but integrated because every resource you you use is taking away from that GPU. I keep a pretty clean system. No add ons etc. People try to blame everything else instead of them selves. If you want a bunch of add ons and extras running all the time you have to accept that its going to take a toll on the system. But without all that it does work the way its supposed to. That's why I don't have any problems with my 9400m. Everything is fluid and no stutters. The 9400m can easily run all the desktop effects.
 
Here are some things I have noticed about Lion and the 9400M GPU:

  1. Launchpad animations are fairly smooth when your computer is plugged into an outlet. When your computer is not plugged into an outlet, however, the animations are horrid and will make your system feel ancient.
  2. I'm not sure why this occurs, but Launchpad animations are smoother when it is accessed from a fullscreen application. For those who don't believe me, try it. It's very strange.
  3. Mission Control animations are decent. I have noticed, however, that when no windows are open the 'zoom out' animation is smoother. When multiple windows are open, the animation stutters.
  4. All animations are somewhat degraded when driving a high-resolution display.

The animations on Apple's new machines are buttery smooth and I hope that, with future updates to Lion, we are able to enjoy that buttery smoothness too.

Yeah, I noticed the same thing. My specs: MacBook Pro MB470, RAM Corsair 8GB 1333MHz, SSD Crucial M4 128GB, HDD Hitachi 750GB, Mac OS X 10.7.3. Actually, when I used a pair of 2GB RAM from MacBook Pro Mid 2010, the animations was smoother. That's weird, since the bus of Corsair is better. So any1 knows the way to fix these hiccups?
 
I have a MBP 09' C2duo 2.26ghz, 2gb RAM(stock) and 160gb. This is the base 09' model, and im running lion and in another partition mountain lion. Lion runs well, but animations are not smooth, but not that slow, you will hardly complain about the animations.
Finder takes a lot of seconds to open. All tho safari runs smooth with multiple tabs opened.
In mountain lion, launchpad is VERY slow, but still safari runs pretty decintly.
I recommend you hav 4 gbRAM just to be sure about overall stability of the system. Just forget about mountain lion, it will hardly run smooth.
Hope it helped,
Viktor

Forgot ! Haha i have the 9400M graphics card. :D
 
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I had the same problem with my Intel HD 3000 and 9400M.. This issue was resolved in OSX Mountain Lion.. Hopefully it is for 9400M aswell..
 
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