Tobey, not only have I heard that, I have experienced that. But Dumb bell flys seem to be the best for me. They really make that chest big. I twist the dumb bell at the top of my movement to hit that inner chest. I have a problem with my chest, but since I started doing Dumb Bell flys, I find that it helps alot. Of course, I also do bench, flat, incline and decline, and usually dips. I used fly machines, but didn't get the results that I got from the dumb bells.