Techs advised that at 1620K BNE time Friday arvo, they made some changes to the NAIPS Server and that has 90% resolved the performance and logon issues (other stuff requires a complete shutdown and restart which will happen on 10 Nov with the ICAO Flight Plan 2012 update)
From what I have seen since late Friday afternoon is that NIS is responding quite quickly.
If you had problems up until then, try again now is all I'm sayin'...