I am 24 and really wanted to start when I was 25. It looks like I will have just turned 26 when I aim to start. Everybody's circumstances is different. There are people who start when they are 50, I am sure we will be just fine.
24/25 is the median for law schools, these days, at least at the ones I know of. I'm 26 myself, and I've found that taking a few years off was beneficial for a variety of reasons. And I would argue taking the time off brought no disadvantages.
Interesting - I just E-mailed @"Dillon A. Wright" today about a similar mistake. On PT32 Section 4 - questions 24 is missing completely. I wonder if this indicative of a bigger issue?