They're extremely close, about 1 mm difference on the left, and 2 mm on the right. But on both hands, my index is longer.
However, I read another article not too long ago that some researchers thought testerone in the womb did the exact opposite, made the index longer. They did this study with "alpha male" type men, and found they tended to have longer index fingers, like some kind of bio-physio indicator of authority (all the better to point it in your face, I guess). They theroized it might be to due to testerone in the womb. Interesting, but it seems ot directly conterdicts the autism t-in-womb theory, don't it?