hmm, interesting ideas... personally.. when you say "warm up" what do you mean?
IMHO
an engine should get fired, without any revving - just fired onto a fairly low but not labouring/knocking idle speed for at least 60seconds, you will not get "localised heating" or anything in that time and it helps alow pistons/rings heat/expand to a point where if you were just taking off straight after hitting that starter button - it would be so cold and with the pressure against rings etc you would only expect unhelpful amounts of blow by, contaminating your oil more then it needs.

so dont sit there for 10mins letting it warm, 60 seconds is fine, but takeoff GENTALLY, its not JUST about the revvs of the bike, keep it low, but not low enough to labour it, it causes just as much damage, just as opening wide throttle whilst its still warming, i personally ride in 3,000-4,000rpm on the NC30 with a 14,000rpm redline. below 3,000rpm she labours on anything more then level road, and im light enough to not need to rev it passed 4,000rpm before hooking the next gear and riding smoothly. after 5km of that, i slowly work it out further and further, then after 10k temp gauge will be @ 90degrees C, all is well, and the engine gets a fair flex throughout the range, typically gets one dose to 12,500rpm in 2nd at around 20km of my commute. My commute is 30km, and for the last 10k i tick along in top gear pretty much @ low revvs (but not labouring!) and let the temp gauge roll down a bit before pulling into work, and letting it idle for a further 20-30 seconds to keep circulation and alow even cool down.

Thats all just me! and maybe im a weirdo, but the VFR400 seems to like it, and the long commutes are good for it.

cant say ive pulled it apart and checked it out internally, but seen many water cooled modern singles, in blown up state and near blown up state and listened to how the rider was riding it etc and what they expected they should be doing to run it in etc... and oh dear there are some "different" theorys out there, and if im looking at their barrel they obviously didnt work :P