Do girls learn faster than boys?

I’ve been wondering this for a week or two now.  We’ve been EC’ing DD since about 9 days old, and we’ve only changed maybe 2 or 3 truly poopy dipes in the past two weeks (she is not 4 weeks old).  95% of the poo ends up in the potty.  DS didn’t get to this point until about 2 months of age.  So do girls learn faster than boys?  Of course, it could just be their different personalities.  DS never seemed to be bothered when he needed to “go”.  DD, on the other hand, has fits and squirms and fidgets until we take her to the potty.  If she keeps this up, she’ll be out of dipes in no time at all.  But, before I go counting the chickens before they are hatched, I need to remember that EC is totally a journey.  Just because the LO’s are using the potty at one time, doesn’t mean that things won’t change.  (DS hasn’t consistently used the potty in months! He’s just WAYYYY too busy running a muck to be bothered with potty stops.)  For now, I’m happy to have a 4 week old that poos in the potty, which is infinitely better than pooing in a dipe.