Any android phone with the snapdragon processor feels that way.
It's not the processor that makes it "laggy" (I would call it smooth vs. choppy scrolling, no lag when launching apps or anything), it's android itself for the 2.0 and up versions currently. The reason the Incredible is so smooth feeling is because of the HTC Sense interface laid on top of Android. My Hero with a 500 some mhz processor was the exact same smoothness as my Incredible. Google is planning on addressing these cosmetic issues with their next release (2.3 Gingerbread) from what I've read.
Also, there are a bunch of Home replacements you can download for Android that can make scrolling a lot smoother similar to what HTC Sense does. LauncherPro Beta is the best out right now, I have it on my gf's droid and it's just as smooth as this:
Sonic Champion!
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