From lots of experience at judging Model Flying T+G Competitions, I have seen many methods of doing a Touch and Go, especially if you are trying to do as many as possible in just a couple of minutes.
If you fly a correct landing, fully flaired, and land at Vs, then you need to accelerate back up to take-off speed before taking-off again and climbing away... All very time consuming. So most Model T+G Competitions are won by flying at Vapp, then bouncing on the Wheels, as you apply full power for the go-around and next T+G.
It' all in the title... Just a Touch is all that is needed. ( even with just one wheel.)
I have even seen model gliders with skids do T+Gs, but admittedly flown a lot faster than Vs. Also a full size glider at the Myndd, managed a touch before the Bungee launch point on the ridge..
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