You keep saying that, but is there one in this thread?
I half-way agree about the arms; they aren't perfect, but the imperfection is only evident on relatively close examination (ie, paused first-person perspective), and I suspect not many people are familiar with what higher-than-average muscle mass actually looks like close up (and without Hollywood lighting). I fail to see where "extreme low poly" is coming from, as well. There's gotta be a lot of tris in that arm, and it does have to run on the consoles...
Anyway; room for improvement, but not what I consider a big deal.
I am one, but anatomy is hard for me for whatever that's worth. I use a book of poses when I want my anatomy to look right, which is always. I'm great at the shading and detail stuff though and I'm decent with perspective.
Here's the best thing I have on the internet, according to my own opinion on my work, to give you some perspective.
http://www.facebook.com/photo.php?fbid=163061477059057&set=a.163059673725904.33664.100000656165259&theater
I tend to agree with you though, regardless of whether I'm a credible source of anatomical accuracy.