To my opinion, the reason for the time until sat fix is getting worse is just the fact that the lto.dat files that are packed with the diverse ROMs are outdated. So I guess the quickest soloution for this problem is to download the latest lto.dat file by our own. Following crypted and pacificwing's suggestions I am using the following two commands in the <hal> section of the gpsconfig.xml file:
In my Opera browser I have bookmarked "gllto.glpals.com/30day/v2/latest/" (thanks to pacificwing for the link). If I know that I will use GPS, I am just downloading the actual version of lto2.dat; then I always have the same quick sat fix.
With best regards, maris