I've been testing all this season's hot new drivers (King, Havoc, Vulcan, CDD2, PPD2, Nuke, and Katana), and to this point my Flows still own them all in terms of grip, distance, and control. Unfortunately I just lost both my GL and the Opto in my bag...I just replaced them with a new GL...an ugly purplish color with cool looking swirls and bits of other color 175g. This disc is more domey than my old GLs, on par with my Optos...Anyway, it bombs. It's a touch more stable than the other GLs I've thrown, which is sweet. It's like a hybrid between the Opto and GL I was using. I think I'm going to grab a couple more of this run and I will be a single plastic Flow guy.
I still maintain that the Flow is the best all around speed 11+ driver. It's just so straight, glidey, and forgiving. It can do low ceilings, but doesn't die if thrown with some height. That last sentence is the key to why it's better than all those faster drivers. Everyone of those I mentioned at the top of my post require a specific height to get anywhere near their max D. They are also very hard to work on different lines and have real control of imo. I can see how something fast and wide rimmed would be better for a 500' thrower, but most these new discs are understable. Despite their understability, they still have a cruising speed at the top of the range of those they're marketed towards. The result is that more people are throwing discs that go really far once and a while, but are unforgiving most the time.