From my limited experience here is what I think. In an instance of a complete loss of power, initial students are taught to establish Vglide (which I believe correlates to your 125).
Just to broaden the scope here a bit and perhaps make the -34 pilots' world a bit bigger...
Can't speak for the numbers on the T-6, but sometimes the "Glide Airspeed" is not always the "Best Glide." For the -34, Glide airpseed is 100 knots, but if you dig in the Natops, you'll see 100 knots isn't always going to give you the best glide ratio. Since we don't have an AOA indicator that's marked for anything, we don't have it to use for the extra gouge.
llnick's idea is a good one. If you think the situation is right, go talk to Stan (or whatever the AF's equivalent is) and bring this up. Either an IP is putting out bad gouge or you don't completely understand, or misunderstood, what he was saying. Either way, something good can come out of it.