YAAR (yet another amateur review
) ... but thanks for the link. He didn't mention the new Canon 24-70/4is btw?
However, you generally know some review is crap when it talks about "the best" and not "most appropriate for usage scenario xyz"
In this case the criteria are supposed to be: ...
Elements like the best sharpness, bokeh, vignetting and brightness, and optical stabilization are put into account, and Kevin and John pick their winner.
... which ignores the fact that for events and such (except "posed" shots) IS is no good because of motion blur and the small "lock on" time for IS, and in addition to that a faster af is critical in these situations - and the Canon has the clear advantage here.
Disclaimer: I do think Canon needs a kick in the a**, the 24-70Lii is overpriced atm and it's great Tamron released a competitive lens which probably is preferable for many cases (if you really need to trade f2.8 for limited zoom range).