The process now takes anything from 1.5 to 2.5 hrs which works. But I still think its a huge ammount of time for doing nothing.
This is incremental download with "Disable all superseded Software Updates" unchecked.
Don't know if this is the normal state for everyone else? If so then we can close this thread but if not I'd like some more advice on what to check.
@Sebaha: There is nothing strange in the logs.