Hi Ezz
I too have an anterior placenta, and yep, I found that I didn't really start feeling any movements until about 19weeks. And even then they were quite light and very low down (just above pubic bone).
I have started feeling more and more movements, harder and more central to my uterus since about 21weeks. It is an absoloute pain being anterior because this is my first baby and I was so wanting to feel movements as early as I could.
There are no real problems with anterior placentas as they are still out of the way of the cervix (which could affect labour).
I have however found out that because babies like to face their placentas, there may be a chance of a posterior baby/labour. This is where the babies back is against your back, this is not an ideal position to birth as it can cause lengthy labours and bad back pain.
There are sites around to help you 'move' your baby into a better postion as you get further along in your pregnancy. Try googling 'optimum foetal positioning'. Basically, it says to get down on your hands and knees for minimum of 30mins each day to encourage the baby to turn (gravity means that bubs will lie on your tummy). Also, don't slouch in chairs and avoid sleeping on your back.
Don't let me worry you though, because its common for babies to turn themselves in the right position. Just something to remember when in later stages of pregnancy.

Good luck and I hope you feel your little one very soon