Sort of okay in that he mainly talks about The Black Widow, and what he says about the interpretation of the character is more or less right. But he carries on as if he is the first person, or at least the first male person, to notice how competent she is all through the movie. What he says about this is actually rather obvious, and I touched on it (albeit briefly) myself in my own short review of the movie when I came back from The Avengers the best part of three weeks ago - Natasha kicks butt throughout, when we might have feared that she'd be overshadowed by the bigger, more famous male heroes.
Still, maybe Grey is right that various prominent male critics have missed commenting on the character and Scarlett Johansson's tidy performance. If so, the reasons for their silence might, I suppose, be worth speculating about (however, we could probably come up with all sorts of hypotheses if we started the speculation running).
Notwithstanding all this, The Avengers was, let's face it, something of a cock forest. That was inevitable in some ways, if it was going to be true to the source material. But Joss Whedon's smart and sensitive work with female characters is all the more reason to hope that there are more female characters of some importance in the sequel.