Installed Lion on late 2010 Air-Seems to Run Faster

Can anyone confirm of rejet this notion.  My MacBook Air, late 2010 model, 1.86GHZ seems to run faster with Lion installed compared to Snow Leopard.  Apple has streamlined OSX previoulsy and was wondering if they have done it again.  Certainly not having to support Rosetta and related software should have reduced OS clutter.
Thanks for any info you can provide.

For one thing the kernel is now running in 64 bit mode...

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