OK, got some nice temps so put the tapered TORs on with a schmere of RTV and took a spin. Nice, at all speeds and loads, and yes especially nice rolling on the throttle. They are straight thru glasspacks, with an old school sound ala Cherry Bombs, and I like 'em a bunch.
They pop and grumble a little on decel, but no backfire or loud stuff. I'm due for my 500 mile service, and may have the dealer remap it, not sure yet; I like the grumble!