I am now about 20 weeks pregnant with my third baby. I have JUST THIS WEEK really started to feel her move. Before now, it was little bumps and wiggles once a day or every few days.
My first son I felt around 16 weeks, and consistently there-after. My second son I felt at TWELVE weeks, and my husband could feel him at 14 weeks. He was a VERY active baby, and still is at 19 months! :)
I think that every baby is different, and it also depends on how the baby is sitting in your uterus. I found out Friday we were having a girl at our 20 week ultrasound, and I also confirmed my guess that she was head up, and all the kicks are low and kind of into my placenta so that's why I hadn't felt her much till now. I am pretty sure she has been head up for awhile and am looking forward to her turning so she stops kicking my bladder! :)
Good luck, and I suspect that everything will be just fine. Maybe you'll be like me and find out you are having a quieter girl, instead of a jumping boy :)
SAHM to Charlie (3) Joey (19 months) and baby girl due Nov. 16.