Simon,
Titan 875 with 750 CFM - won't that rip the carpet off the floor?!

Answer to both: In the wrong hands maybe, in the right hands just a powerful tool that allows the operator to do the job more effectively in less time

You don't hold the nozzle right down on the rug, you hold it above so the jet's fan pattern is 3 or 4 inches wide, sometimes higher up if it's a thinner rug, sometimes lower down if it's a thick chunky Chines jobbie for example, which will in no way harm it as long as you're washing with the pile not against it. The impact of the jet dramatically reduces just by holding it another couple of inches higher. Yes you would blow a hole in a very thin rug that had a weak backing, if you held the jet right down low.
I did a couple of those big Chinese ones the other day - on the drive at the front of my house! It's busy with dog walkers and parents back and forth from the school round the corner and I got a lot of gone-out stares from people!!
Total PITA getting them dry in this weather though, been correcting fringe browning on these
