In a quick scan of this (I'm at work!) the review seems to generally tie up with my experiences of it.
I haven't noticed any zoom creep on mine, but then again I've not looked for it. Certainly none has happened in my actual use.
The IS I tend to use as a on/off feature. I never measured its strength. That it is there at all is enough for me.
Lens hood, on this type of lens I'd give Canon benefit of doubt. They're designed not to block light at wide angles, so their effectiveness at the long end is rather minimal. As wide angle capable, the flare prevention benefit is minimal. I did buy the optional hood, and for some reason it seems to be larger diameter than average, so it does take up quite a bit of space in the camera bag. The build of the hood is above average compared to Sony/Olympus/Sigma/Tamron, having the fabric lining on the inside to reduce reflections even more. I tend to use it for protection, however as I found out when a swan pecked the front element, it doesn't protect against everything and a filter may be more suitable in that respect. Now I use both.
Against the competition, I agree this was really needed, and it was enough for me to let go of the Zeiss 16-80. They're not the same characteristics by any means, but in terms of overall image quality I'd rate them similarly.
And finally, there's some typos on this
page. I think there's a few too many USM's going around in the image titles.