Submitted for your approval...
I've got a Macbook Pro, a Dell U2410, and an incoming Panasonic 65VT30.Sources indicate
the U2410 has an average input lag of ~14ms in game mode, so I have a known quantity!
Methodology for your consideration:
1. Measure the MPB against the Dell (in game mode). Record the offset. Average the offset of ~10 readings. Offset + 14ms = MBP_input_lag.
2. When it arrives, attach VT30 directly to MBP. Set VT30 to various modes. For each mode, take ~10 readings. Offset + MBP_input_lag = VT30 input lag @ the mode in question.
3. Repeat with my receiver in-line, etc.
This sounds rational to me. Am I missing anything which might throw a variable into the works?