Is that the sound your drive makes too? Mine goes "clink".
PING Introduces G30 Series, Driver, Fairway, Hybrid and Irons - Page 4
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For me it has, about 1mph which comes out to about 2.5-3 yards longer, on a relatively center hit. The faster you swing the more you'll benefit from the turbulators, Bubba gained almost 3mph I think.
I tried the G30 driver at a local range/pro shop. I did not get to try it on a launch monitor. I hit the regular and then the stiff stock shafts. Then I hit my 4 year old Cleveland DST. There was no noticeable gain in distance. The G30 did have a little tighter shot dispersion. Honestly, it looked like my Cleveland had a little more roll out. I had gone with intention of purchasing but I couldn't tell enough difference to spend that kind of money. I think it's a good club but it didn't convince me that it was worth the money you have to pay for it.