Grant McCann tucked away a 79th-minute spot-kick to earn Posh a point - a first positive result from a losing position all season for the strugglers.
The Northern Ireland international made no mistake after skipper Tommy Rowe had been upended by James Chester - a one-time Posh loanee.
He spared the blushes of young team-mate Joe Newell who had swiped a Robert Koren corner into his own net to hand the visitors the lead.
Bruce said: "You're always disappointed to be pegged back in the final few minutes of a match, but in all truth I don't think we deserved anything more than a point.
"We gave away a soft penalty which I have absolutely no complaints about, but I can't be too disappointed to be sat third in the league with only goal difference keeping us out of the automatic promotion places.
"While we have to praise the many fans who helped to clear the pitch of snow in the morning and the hundreds that made the journey down from Hull to support us, the game itself wasn't much of a spectacle.
"Any footballer would have struggled to play on a slippy surface where the ball was jumping around all over the place. Only in England would we have got a game on in these conditions."