I agree with you, chscag. I also did not do a clean install, upgraded my machine. Overall, I also agree that Lion is much faster, though have also noticed one of the problems CmdAltEgo is reporting as well. Preview has taken a while to open some file types. This is after I did a bunch of messing around with my icons, however, and have yet to do any clean up operations. But yes, clicking "open in preview" on a .icns file I had open in quicklook saw Preview hang for about 20 seconds (considering my SSD screams, I'm going to say it's probably not hanging on a disk read).
I've noticed a couple other minor bugs, but overall, Lion runs faster than SL does for me. 2GHz core 2 duo with 3MB of L2, 180gb ocz vertex 2, 4gb of ddr3 1066mhz ram, and a 1066mhz fsb. I think the major difference for me on my machine is apple finally enabled the 64 bit kernel for this model, which before since lacking the "pro" designation (depsite nearly identical hardware, i.e. logic board is the same, and chassis etc) was locked out of being able to access the 64 bit kernel (holding down the 6 and 4 keys still booted the 32 bit kernel, but now 64 bit is default, even!). Now that my kernel can crunch data at twice the bitrate, the SSD is shining through in system tasks even a little better than it was before.