I'm in So. Calif, it's not an elevation issue, always less than 1000'MSL. I'm perplexed also, but I'm glad to hear the P4P will do 30mph with OA enabled. And I'm starting to think the range of P4P is acceptable too. Initial reports weren't so good, but more are coming out with good range. Have you been able to test your P4P with clear LOS, with no trees in the way? If yes, what was your range achieved?That's crazy, such a huge difference between two P4s. What altitude above sea level are you?
On another note my p4p goes 30mph with OA.