After making four starts in the RaboDirect PRO12 the 22-year-old set about making the Scotland shirt his own, his last-minute drop goal securing victory against Italy at the Stadio Olimpico.
And Townsend is in no doubt that Weir can also lead Warriors to bigger and better things as the stand-off continues to fast-track his development.
"His drop-goal against Italy, to give us our first win in Rome in eight years, was executed with real composure and underlined that Duncan can operate at the highest level of the game," Townsend told the Glasgow Evening Times.
"It's worth reminding people that Duncan is just 22 and improving every day, both technically and tactically, thanks to his superb work ethic.
"With his growing maturity, Duncan's ability to lead the attack - at international and club level - is also beginning to become a real strength of his game.
"What's more Duncan is a proud Glaswegian and has a big future at Warriors."
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