Our Go-around procedure calls for manual intervention quickly. You've barely started climbing on reduced power when at 1000' agl, you select FLCH, 200kts, and get accelerating to retract flaps to at least (or most) Flaps 5. Exceeding Flap20 speed up to 1000' isn't really a factor at all.
PS- please don't ask about the THR button! I try and ignore it.