Richard,
I had a Diablo strada on the rear of my bike until recently. Two up it lasted just over 3k miles, which is better than the pilot sports at 2k5, and BT010s at even less
The Strada did exctly as Jools said above - looked a bit low but good enough to get me home from Germany. 150 miles later of sedate riding (nursing it) I had cord showing
I've fitted a Diablo Corsa this time around.
You rode with me earlier in the year (French trip) so know the way we ride is similar. I have never managed to get over 4k out of a rear. My best effort was 1k8 out of a BT010 (cord showing) on a vfr800
By the way, I've tried Dunlops too, but didn't like the feel of them.
Hope that helps.