After a couple of intervening peri visits, I had my standard 4 week check up with my OB (actually saw the midwife), and she confirmed that less movement is felt in early pregnancy with an anterior placenta. (Makes sense, too, when just considering anatomy positioning.) Last weekend, when I was 19w3d, I was lamenting/worrying on Saturday that I've hardly felt the baby move at all, and then all of a sudden on Sunday, I started to feel stronger movements (often like he or she is kicking my coccyx area--weird feeling, but makes sense on baby & placenta positioning), which have regularly continued through out the week (I'm 20 weeks today). Finally!
The midwife didn't think, however, that the tenderness I've been experiencing in my lower abdomen area is related to the anterior placenta (so much so, I can't wear low rise maternity pants because they press in exactly where it's tender). She said it might be from the stretching of the muscles/ligaments/uterus that were already weakened by my first pregnancy. She suggested a support band, but I think that will just press exactly where it hurts. I'm not convinced. Anecdotally on these boards, other women (like those of you above), with anterior placentas have noted their tenderness/soreness, esp when they haven't experienced it in prior pregnancies where their placentas were not anterior.