For anyone running the card style 100 mm MAF's you have probably noticed that the IAT reads about 15* or so higher than your stock MAF/IAT. HP Tuners gave us a new table in the 512kb & 1024kb LS1 platforms that you can use to adjust the IAT scalar.
I tried this yesterday and it works great. I lowered the entire stock table by 15% and I ended up within 1* of ambient. Heat soak at stop lights had its normal rise and once moving it drop like it used to with the old 85 mm MAF.
You need the newest Beta software to do this change. It is in the engine diagnostics section under airflow.