I don't have direct experience, but would surmise that as long as you
keep your foot out of it I don't think it is going to grenade on you.
Now if you use the turbo will full throttle redlines on a routine basis
maybe there is something to worry about.

There are also some reports of factory equipped A71L transmission in
turbocharged bricks.  See:

 http://lists.osourcery.com/pipermail/bricks/2004-May/001659.html

This list shows specific years which came with the turbo AW71L combination:

 http://www.usatransdoctor.com/foreignvolvo.htm

Another concern might be that the AW72L version supposedly used a
different set of gear ratios than the AW71 and was designed to match the
power/torque curve of the 16 valve B234 engines.

All that said, I would drive the car reasonably and not worry about it
unless something starts acting up.

John

Sorry, I intended to include this link as well:

http://en.wikipedia.org/wiki/Volvo_AW72_transmission

Later Turbos had a lockup AW71 - they started in 1992, IIRC.  The AW72
is designed around the lower torque curve of the 16 valve engine, so
full throttle upshifts should be avoided.  The transmission is at its
most vulnerable when shifting - notice how most new cars (including
Volvos) have a method of having the transmission control unit "request"
torque reduction from the engine control unit when they're about to
shift.  Other than that I'd bet you'll have no problems.