There really is a WIDE range of normal when it comes to teething. DS started his molars at a year and now has all four. He is working on his incisors now and officially has 13 teeth.
I heard once that almost all babies get a bottom front tooth first, and after that there is no normal order. My daughter got her top and bottom molars on one side right around Christmas. I have been able to feel a single point on the other top molar since January. It does not seem to want to come in any more than that. Poor baby.
Re: molars
I don't buy it though since DS got molars as his second and third teeth and still only has 5 teeth total.
My Ovulation Chart