Tyrannosaur predation strategy

[Larry Dunn <recalcitrant_hen@yahoo.com>]

At the risk of being tedious with another tyrannosaur
question, can someone briefly summarize what the
current thought is on tyrannosaur predation strategy? 
(Or tactics, I guess.)

What exactly do the unusual shape of the teeth and the
broad muzzle mean in terms of possible attack
strategies?  I read through the Farlow and Holtz paper
on this, but didn't see the fiddly specifics
addressed.

Were the Tyrannosaurs biting and pulling out chunks of
their prey to incapacitate it?  If so, wouldn't that
strategy be better accomplished by a narrower muzzle,
and flatter teeth?

Were they biting and crushing, keeping with the prey
immediately after the bite was inflicted?  I seem to
recall Bakker writing something to that effect.  

How is this reflected, if at all, in the fossil
record?

Thanks.

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