At 2000 ft, the IAS was 108 kts at 5.3 gph and 70% power. I generally use 75% power, which gives 116 kts at 5.6 gph.
Here's a little trick that someone told me. Unbelievably, it works, although the aerodynamic explanation is beyond me. If you are correctly trimmed (0 on the VSI) in the DA-40 and 70% power gives you just 108 knots indicated, trim a little more nose-down. Initially you will descend a bit but the slightly higher speed (115 knots indicated now) provides just enough lift to counter the descent.
Yes, I didn't believe it either until I saw it. I've only done this at 70% but it might work at other settings too.