I'm not so sure I agree, considering the BlackJack supports 3G. The Treo 750 is a business class phone, so offering an upgrade doesn't necessarily impact the iPhone consumer. Those purchasing iPhones are well aware of EDGE and the lack of 3G.
Palm's history of updates doesn't provide me a sense they have it "ready to go". I also remember hearing that GOOD's lack of compatibility with WM 6 was the issue. Motorola, who now owns GOOD, is expected to ship the
Moto Q 9 (being dubbed Moto Q Global). It'll be interesting to see if that ships with GOOD. If so, then I see no reason why Palm cannot get this upgrade out the door.
I'll ask Palm next week.