I probably should have said, "compares favorably to higher performance/lower UTQG tires."
There is Tire Rack's
Clash of the Titans: Testing Two New Max Performance Summer Heavy Hitters, which compares four Max Performance Summer Tires:
Bridgestone Potenza S-04 Pole Position(UTQG 280)
Continental ExtremeContact DW (UTQG 340)
Michelin Pilot Super Sport (UTQG 300)
Pirelli P Zero (UTQG 220)
Grassroots Motorsports also did a wet and dry test (only the wet portion is online at this time...
Splish Spashincluding the Dunlop Direzza Z1 Star Spec, Toyo Proxes R1R, Continental ExtremeContact DW, and the Continental ExtremeContact Wet (actual race tire).
My personal experience is the Conti ECDW is slower, but damn respectable, compared to Dunlop Start Specs or Hankook RS3 in the dry, but much faster in the wet--I've done back to back to back on a wet race track with the same car, changing tires between sessions.