Dada/Daddy : Baby's First Word??!!??

I never knew that Dada/Daddy is "usually" babies' first word till my friend, Kim, mentioned it to me a couple of weeks ago. Well, who would have thought that Dada comes clearer first before Mama? Can somebody please explain this to me? 'Coz I still find it weird! =) Oh well, at least now I understand... I still remember that day when we got home from work, and my son, CJ, just never stop babbling "Dada." It was really a touching moment for all of us, especially to PJ. We ended up recording it and begging him not to stop until he got tired and start his usual snoring at nights! LOL!
Well, as a consolation for me, being the mom, he can actually say Mommy/Mama, only in a different way... It's my family who really enjoys it everytime they ask him to say, "Mommy/Mama." Why? Maybe because I've grown so big, that he actually pronounce Mommy as "Ba-bye!" You would actually think he said it as "Baboy" (Tagalog word for pig!!) Great, isn't it? Don't get it wrong.. I'm really close with my son, that we tend to forget his dad's existence especially when he's busy with his laptop. I guess I'll just have to buy Kim's explanation why he can't still say Mama clearly.
Anyway, we're still enjoying his toddler years! And the fact that he's starting to babble a lot is a sure sign that he's right on track and very much healthy. He sure is getting bigger each day, and I just can't get enough of him...Motherhood is really an overwhelming experience, not everyone gets to be a mom...and not every mom gets to be called "baboy" by her own toddler!!