I just got #13 yesterday. Context suggests Earth-benching is a legit feat (no yeah-but's). However, unless there's further important context in later issues, I already see potential "problems" in this issue (ie, "He can do that, but had trouble with this?")
That really is a killer feat, though: puts any previous planet-pushing (including pre-crisis) to shame.
Shinier than a speeding bullet.