There should be time counters for each application running. I noticed on my Droid that it tends to skip numbers. For example the counter for the Gtalk app always skips the number 3. I have been experiencing a lot of typing lag as well and I think it had to do with the counters lagging as well. I'm heading to my VZW store to swap out this unit tomorrow if the lag persists.
Okay so I noticed that the lag only occurs when I responds to posts on a certain forum (androidforums.com). This is a very odd bug. Other than that my typing is very snappy at every other site.