My second one had her first tooth around 7.5 months. Although having teeth at certain times looks like a milestone indicative of normal growth, I would be happy to have had my daughter's teeth come out later. She is now 11 months with 3 teeth & a fourth coming out. Let me tell you, it's a pain to breastfeed & she bites me (shoulders, arms legs) when she's teething.
My daughter had her bottom two front teeth at around 8-9-months but then she got one of her top front teeth about 2 months ago. She just FINALLY got her other top tooth about a week ago. She is so impressed by the chomping noise she can make when she clicks her teeth together so she's decided to try it out while breastfeeding--she bit me twice today. I took her off the breast both times and gave her a stern "no" which made her cry and whimper a bit (probably mostly because she wasn't able to continue breastfeeding). But, I don't know if she's getting it and it HURTS like heck when they bite! My, oh, my!