My observations, which should carry some weight given that I've installed both 10.7.3 betas on two very different machines, have seen identical improvements: a Mac Pro 2007 and a late 2011 MBPro.
The first 10.7.3b1 actually created problems for both machines. They became buggy in general with numerous, random beach balls and slow behavior for all applications, but in particular Mail and Safari. It was so bad that I stopped using Safari altogether. Now, with 10.7.3 b2, every single performance issue is gone, and with my experience on both machines, they've actually gained speed...and yes, "snappy" is applicable! More so than 10.7.2.
Truly, I am amazed at the overall speed and stability between the first and second betas. I notice no new features whatsoever in b2; this seems to be a completely under-the-hood update. With the full update weighing in at 1.13GB and the delta at 759MB, there are apparently lots that they've tweaked.
The first 10.7.3b1 actually created problems for both machines. They became buggy in general with numerous, random beach balls and slow behavior for all applications, but in particular Mail and Safari. It was so bad that I stopped using Safari altogether. Now, with 10.7.3 b2, every single performance issue is gone, and with my experience on both machines, they've actually gained speed...and yes, "snappy" is applicable! More so than 10.7.2.
Truly, I am amazed at the overall speed and stability between the first and second betas. I notice no new features whatsoever in b2; this seems to be a completely under-the-hood update. With the full update weighing in at 1.13GB and the delta at 759MB, there are apparently lots that they've tweaked.