Naw, not jaded.. good eye. You're right, from a technical standpoint, Hasselbeck's head is what gives it away, the skin tone is a tad more pink than the body, and the head is just slightly out of proportion, but I understand why because of your previous explanation. But even that is only noticable on close examination.
Bettis, again from a technical standpoint is perfect. You just have to forget for a moment that in reality he's about 100 pounds heavier than that body. But if you didn't know who Bettis was, fuggetaboutit. The extraction and paste-over is almost perfect and the lighting / skin tone (by far the hardest part) is awesome.
Just for kicks I looked at 700% magnification (I 'debunk' photoshop jobs at an unrelated web site) and was very impressed with your cuts... had to look really hard for any pixelization or tell-tale signs.
Bravo.