Partner must have thought he was playing matchpoints - although there are a couple of situations where you should slightly stretch to overcall: 1C-1S and 1D-2C, the emphasis is on the slightly and not the stretch.
I like to play a new suit by advancer after partner's 2/1 overcall like basic 10+ bridge, i.e., advancer's bid is forcing for 1 round. However, this method is unplayable unless you can count on solid overcalls, especially in the minors.
Winston

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