My intro back to clinchers ~1988. Living in the Ballard community of Seattle. Used to ride north following the Puget Sound shore but in a couple of miles on very quiet roads. There was a descent into Woodinville that had a 90 degree bend at the bottom. I knew it very well and had done it many times in the wet on sewups. First time with clinchers - winter NW wet. Maybe light ran but I recall seeing OK. Hit that turn and knew instantly I did not have the traction to make it. Expressed the F word very load because I knew exactly what I was in for. The road rash, the bruises, the wet dirty ... At the apex, tires let go and I went for the slide. Outcome exactly as expected.
As soon as I slid to a stop, an attractive young lady appeared. Had to apologize for what she just heard.
And clincher vs tubular for cornering traction? The new clinchers have very, very good tread (the Vittoria Open Paves and I assume the G2.0 Controls; the regular G+ are very good) but I bet, in the real world, the tubulars with the same casing and tread do better. And I've done my crashes. I won't take either to their limit unless that is what I have to do to stay ER free. So someone else is going to have to do that research. (I'd have to glue the tubbies on hard to max out the turns. If I raced, yeah, but otherwise? I'll take the knowledge that I will roll the tire before the tread slips so I have a tire feasible to change on the road. (I ride with brakes for a reason.)
Now, if my hunches are right, my Vitt G2.0 Control 30c tubulars ought to grip like flypaper.