He's right, but I don't think the criticisms are all that relevant.
This show isn't really about creating a super-realistic portrayal of American troops in Iraq. It's mostly character-driven. At least in the first episode, most of the show was about the members of the platoon interacting with one another, rather than the tactics of how the Army would deal with a group of insurgents holed up in a mosque.
This guy misses the point- not every war show needs to be a hyper-realistic documentary. Is Rescue Me hyper-realistic when it comes to firefighter? Is The Shield super-realistic about what cops do?
God -- I hope not. Because if anyone as drugged up as Leary, et al., try to save me from a burning building, I'll jump!