I know for a fact that the Cessna 400 does 138kt IAS (at say 5000ft) at 11.0 USG/hr, and the TB20 does exactly the same. I don't recall doing this comparison in the SR22 though.
Of course the C400 is faster than the TB20 but it has a bigger motor, and due to being turbocharged can go to FL250 where you get great TAS numbers.