In my test i've see that is not important how many satellities you have but how many signal you have on i single satellites. another test that i've do is for receive more satellites: i've delete all files in GPS directory then turn ON and (on open space), go to secret menu and select EPHER....and COLD.. and wait for 10-15 minutes for best reception without go out from that menu. I've see the reception of all satellites but accuracy always 8 - 12 about. So i've understund that accuracy is depending from quality and not from number