It would be nice to try one, to see the difference from my own large single (Teresa is 652cc and tuned to yield 50hp and 62nm at 5500rpm on paper). She doesn't walk anywhere idling, unless it's cold and she raises that idle to ~1800-2000rpm.
What I'm really curious us that similar engines can really be tuned so very differently or it's just me and my hypermiling, low-revving style that makes the difference
Yes, I really don't have much experience with different bikes, I've never ridden any beside our two and the instructors' ones... but the reviewers say very different things about F650s and Dukes, so there must be something in the bikes too