My love of ereading should be no surprise to anyone at this point. But Staples has this test, where they mock up the ereader experience and then time you reading, followed by a quiz to catch your comprehension. I confess I might have gone a bit too fast on the first test and, erm, failed the quiz. But the second I went at a more reasonable pace and still did quite well. It had me read 444 words, and my speed was 408 words per minute. This apparently makes me 63% faster than average, and apparently means I could read War and Peace in a mere 23 hours and 59 minutes. (Uh, pass. But good to know.) Catch-22 would take about 7 hours.
http://www.staples.com/sbd/cre/marketing/technology-research-centers/ereaders/speed-reader/index.html