It's funny.
Whenever there's a thread about the Army (like, say, THIS ONE), the USMC comes running ;)
If you REALLY ask around, it seems the USMC is overly concerned about the Army. After all, you're here, aren't you?
You want to look at in-theater depolyment numbers to see who's fighting? I'd say both the Army and Marines are shouldering the burden and leave it at that.
It's all interservice ribbing. Don't take it so seriously. It's sport and pride and competitive strutting. That's what guys ~do~...