The result also meant Munster became the first RaboDirect PRO12 team since December last year to leave Scotstoun with a victory, and in doing so also leapfrogged Warriors to top of the table.
But while disappointed with the result and its consequences, Townsend expects his team to channel the loss into better performances in the coming games, starting away to Connact this weekend.
"There is no doubt it is disappointing to have lost our unbeaten league record on home soil and also our long unbeaten record at Scotstoun, which goes back to December 2012," Townsend told the Glasgow Evening Times.
"It's disappointing but we've got 22 games in this league and we'll have challenges every week and the next one comes on Saturday at Connacht
"So it is up to us to make sure we learn lessons from the Munster game and make sure they are put to good use at the Sportsground."
"Although it is disappointing to have lost the lead in the PRO12 there is a long season ahead and it is about how quickly we respond to this setback that is important now."