There is no data to prove old style bh is taught any more than current style. I see 8 years olds at the club with fed style bh's all the time. If you look at any college vid of one handers they all have the modern stroke. Where are they learning it?
yank backwards? on what?
Yonex VCore 100s - SW 351 6pts HL
Tour Bite / Luxilon NG 16 @ 51lbs