i have had a lot of nukes lately but the are usually in the 40-0 to 35-5 score range, never double that. i have had a lot of games with 70-100 kills but they always come with 10%-25% deaths.
it's been my experience that there are cheaters in about 20%-25% of newly assembled game lobbies, so im never really suprised by it, it's just a part of this game, if not most games. just leave and find another group.
I've had games like that too but without the quick turn and just enough shots to kill someone it's nearly impossible to get 0-5 deaths AND see the other team enough to get 70-100 kills. I've had games like 40-8 or 60-10 but it wasn't in DM games, it was in tactical games where I could camp out and the score didn't count towards end of map..