Guess it goes to show that grooves or no grooves, don't matter in dry conditions if you hit it good.
That said I, I still see pros using the new nike wedges w/v gooves that conform to the new groove rule, and they manage to spin the ball like crazy off the green.
I got a friend who uses a tom wishon wedge lob wedge and an F2 gap and sand wedge both over 2 years old, he spins the ball back a good 5-10 feet depending on conditions. Guy looks at me and says "ho ah...!!! (sniker) I spin um just as much as your 200buc jdm wedges, and I just laugh and say 'yeah but, mine looks prettier'"