Opinions changed, everyones. All opinions changed to good ones, not always.
But on my server I have tanked instances well below level without a problem, even going so far as to tanking lvl 72 elite non-herioc bosses @68 (all of steamvaults and all of shadowlabs upto but not including murmur.)
I get whipsers all day long asking to tank stuff. (and heal too, as I switch back and forth for guild and I have been told I am an excellent healer).
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Currently lvl 69, 10.5k+ unbuffed hp, 10.7k+ unbuffed armor, 471 defense.