AutoTap Sample Rate

Is the refresh/sample rate on AutoTap limited by software or OBD II communication? If it is software, is there anyway to increase the sample rate?

Alright being that no one knew the answer, here are some facts I found out in a recent e-mail:

-Most GM and Ford vehicles = 30-35 updates per second

-The "export to comma delimited" turns the log file into a .csv to use in a spreadsheet. The .csv file will also provide a timestamp for each parameter update

-The VIN is automatically read on GM, but for Ford or imports, the VIN has to manually be entered.

-V 3.1 improvements over v 3.0 are better error handling capabilities

The one thing he did not answer is if AutoTap reads the datastream under WOT. It seems that I couldn't the 4 times I tried.
Also, I am still not sure what is the limiting factor in sampling. If I have almost every parameter monitoring, is the sample rate slow because of the software or hardware?