Actually I think my post said that the first Q9c I flashed I was able to get EVDO, but that I have not been able to get EVDO on any other Q9c except that first one I did.
Anyone that says their phone "sometimes" gets evdo probably has an evdo prl loaded, that is not authenticating, and therefore, is *never* getting actual evdo connection.
They're just getting the EV icon, which they probably don't notice that it changes to 1X when doing data. On the Q, you have to press the 'Home' key during a data transfer, in order to see if the icon is EV or 1X.