I initially titled this post as "Tanking weapon speed", but I realised that's not exactly what I'm asking. Prot is now no longer a simple tanking tree, it's a pretty decent solo / leveling tree, as well as a viable PvP tree as well. And, oh yeah, you can do a bit of decent tanking as prot as well ;-)
My question is, will an ultra fast weapon still be the weapon of choice for a prot warrior. The way I saw it, is that the faster the weapon, the more HS's .. more HS's meant more threat.
With all the really cool threat generators around now (SS, TC, SW), I see HS's role as being less important. The fact that devistate is weapon damage based also waves the flag for the higher damage weapon, not higher speed.
So, I have 2 "tanking weapons" on my warrior, neither are fantastic, but neither are utter trash either (Grom'Tors, and Inuuro's Blade). The thing is, from my pre 3.0 fury days, I have the Wicked Edge of the Planes, which seems to be a vastly better option with the new prot tree than either of the other 2 weapons.
My perspective ... I plan to level as prot (well, still haven't decided that 100% yet) and do the occasional instance. This current gear issue is really only applicable to about level 75, when I'm pretty sure I'll have picked up something better. The overall conceptual question still remains ... Faster speed, or higher damage for tanking.