[neilc]

Are you kidding? The 3G has a very noticeable and annoying latency on input (e.g. when entering text, when switching between modes in the Maps app, or when switching between most apps). It's not the end of the world, but feedback is hardly "instant". Text input latency seems notably better with iPhone OS 3.0, happily.

[DougBTX]

Is there a phone which does A? The iPhone does A. Are you kidding, the iPhone doesn't do B!

The grandparent specifically asked about a 1/4 second delay on all touches, the iPhone is (at a guess) faster than 1/16 seconds, certainly well below the magic 1/10 of a second.

Switching apps on the 3G can certainly be sluggish, but is a very different problem, solved in part by upping the processing speed in the 3GS by 300MHz.

[neilc]

The grandparent specifically asked about a 1/4 second delay on all touches

So? The parent post specifically asserted that "feedback to touch is instant", which is plainly not the case.