As for me, 10 fast fingers is too easy test. Just try this words per minute test at http://www.ratatype.com/typing-test/. You will definitely get less.
<a href="http://10fastfingers.com/typing-test/english"><img src="http://img.10fastfingers.com/badge/1_wpm_score_BQ.png" alt="Typing Test" /></a><p>Visit the <a href="http://10fastfingers.com/typing-test/english">Typing Test</a> and try!</p> Words per minute (WPM) 68 Keystrokes 342 (342 | 0) Correct words 65 Wrong words 0 You are better than 87.51% of all users (position 16863 of 134970 - last 24 hours)
97 wpm / 100% accuracy That one is really annoying to type because none of the sentences make much sense.
I think what makes it a lot more difficult for me is that it is just a random string of words. I kind of try to make sense of it while I type, which is just distracting.