Again. I repeat. How fast you get a lock means nothing. When I set it to supl.google.com I get cr*p ACWP support, if I enable GPS I get a lock in <30 seconds.
It's *very* hard to reliably test what is going on, I'm using ACWP only as a measure because I can see clear differences between selected servers:
- set desired server
- reboot
- run acwp script I posted

Maybe I should wireshark the connection between n900 and supl.* to show what is going on.