I've noticed that as well - it's particularly bad in, say, EGM. I went through one issue and dogtagged every page that had some kind of emphasis on the mammaries. Needless to say, I marked nearly half the magazine.
What kills me, is that people complain that gaming isn't taken seriously as an "adult" hobby, yet the games and magazines are littered with these sophomoric, wildly exaggerated portrayals of females. Of *course* the general public is going to look at that and come to the conclusion that games are only for pubescent males who have never kissed anyone other than their mom.
It's embarrasing - I was out of town for two weeks, and had my neighbor pick up my mail for me. While I was gone, the latest issue of CGW (I think) came in with some ridiculously proportioned 38 DDDD charater on the front cover - I can only imagine what my neighbor thought when she saw that.