I'm a first timer and felt mine kick quite strongly at about 19 weeks.....actually never really had the fluttering just went straight in with kicking. Now she's kicking about in there ALL the time!
I am 17 weeks and I felt my baby kick twice now, where as before it was just butterflies. Most doctors say if it's your first baby you won't feel them kick until 20 weeks to 25 weeks but I Suprisingly felt mine sooner.