Been a week now with my Desire and I simply can't get used to the optical trackpad. Don't do a lot of browsing, but do a lot of texting, emailing and tweeting and I used to use my Hero trackball to move around text fields to correct mistakes. I find that the trackpad is so unsensitive that it takes me five or six "brushes" to make it go back one character. It's now quicker for me to backspace-delete and re-type things. Does the trackpad "wear in" at all?