The Robins clinched a place in the third round, beating the Championship outfit 2-0 with goals from Nile Ranger and the excellent Alex Pritchard.
Former Newcastle striker Ranger scored his first goal for his new club, netting from close range seven minutes before half-time following good work from Pritchard on the right.
And Pritchard scored in injury time when he squirmed away from Clint Hill before nudging the ball past keeper Brian Murphy.
Bond, speaking in place of boss Harry Redknapp, who is on crutches following a knee operation, conceded that it had been a dismal night for the west London club.
He said: "We did put a strong side out and wanted to build on the results we've had this season and keep the momentum going.
"It wasn't a game we wanted to take chances with. With wanted to progress but it turned out to be hugely disappointing.
"We upped the tempo in the second half, but ultimately the damage was done in the first half.
"We knew Swindon would play good football and they did, but in all fairness I think we allowed them to play and as a consequence we never got our game going.
"It was too slow. We didn't play quickly enough when we had the ball. We picked it up in the second half but we got what we deserved. It was a fair result.
"We had a goal ruled out for offside which may not have been offside and we also might have had a penalty for a challenge on Shaun Wright-Phillips.
"But in all honesty we're clutching at straws there. Swindon deserved to win and it's not been a good night for us,
"The manager knows what areas he wants to strengthen and I don't think anything will have changed after that game."
Swindon manager Mark Cooper was naturally pleased with his side's effort.
"It's a great result for the club and gives us a chance to earn some more money, and in the first-half I thought we were the better team," he said.
"When you go 1-0 up you know what to expect from Premier League players and they come at you fierce and tough, but we stood up to it.
"We were a little sloppy in possession and invited too much pressure, but the players stood up to it and kept their shape and put their bodies in the way and got the breakaway to seal it at the end.
"We were tested and Darren (Ward) and young Grant (Hall) did very well, and from a team like QPR you know you are going to need to defend and to defend for long spells."