Normal was very comfortable! Telling the truth, it felt a little on the "easy" side once I went to Hard and failed pretty quickly, heh. Not sure how many errors you're allowed on Normal but I felt like I got away with a lot :)
Fair question about stats, I don't know what all's possible or useful, but I was thinking, like:
- number of mistakes made;
- overall accuracy as a percent;
- words per minute;
- characters per minute (or second?)
Cheers!