all I can say is this resistive screen is highly responsive. My only comparisons for this is the G1, perhaps the Iphone(blah) but I've had and own a G1. Typing with the on screen keyboard on the N900 is just natural and I rarely make any mistakes. Granted the first thing I did was calibrate the touch screen with two hands and I feel this has helped with typing. Anyway, it(n900) just responds to all my touches with no problem. One of my biggest gripes with a capacitive screen (again basing this off the G1) was that I had to hold it a certain way or rather touch it a certain way to have touches register. And if i used anything other than my bare skin then that was a chore. This resistive screen and whatever tweaking they did is excellent in my opinion and i dont feel they should change it.
throughout reading these debates about capacitive vs. resistive, the most beneficial points of resistive is the ability to use any object to register a touch not just a finger tip. (Women with long nails are thankful for that , people who have to use there phone in colder weather can where gloves, people who do not want to dirty up the screen 'cause their fingers are dirty can use another object). The other is that, resistive is more precise for things like handwriting recognition(still waiting for an app that will take handwritten text/cursive and reformat it to the typed font that is selected, I'm looking at you Xournal - anidel).

Again, this is just my opinion why they should just stay with resistive.