OK here it is...
I've been on court twice with JS12. I agree it's a touch stiffer than BS12. To me shaft stiffness ranks alongside HX800. I can bend it pretty well.
Hitting surface is more solid compared to BS12. Frame isn't as fast but still fast enough. I don't see JS12 as a replacement for BS12 but it certainly is a successor. I feel it hit harder.
Whilst I really liked JS10 and the way it played, JS12 has a more open, friendly and stable feel on the racket face compared to a closed, tight feel on JS10.
It's too early for a full review but so far I'm loving it and happy to leave both HX800 and JS10 in my bag.
My version is 3U G5. Not sure how 4U version will play when it arrives. It could be better but I'll refrain from guessing.
For me JS12 is a triumph. It's no surprise so many of the Victor sponsored players have switched to this racket.
Paul
www.badminton-coach.co.uk
Nice. I'm curious how the 4U version will play if you're saying that the 3U felt a bit slow. The JS10s are 4U right so maybe the 4U JS12 will be excellent.