Sounds like you have to go out and play. Find a nice streight road, away from any cops ("But honestly officer, I wanted to see if my clutch was slipping" will not get you out of a ticket).
Try to recreate the problem. In low gear, at the right rpm get on the gas untill you feel it "slip". First find out exactly what it takes, so that you can do it at will. Don't worry about further wear, if your clutch is slipping, you'll have to replace it anyway.
Watch the tach and speedo while this is happenening.
If your clutch is slipping, the revs will surge forward, without a corresponding rise in mph, or feeling of acceleration. The revs should actually come down afterwords, as you are speeding up, as the clutch catches traction.
If your tire is slipping (and it is very possible, you may have gotten more aggressive since your R1), Then the revs and the mph will surge forward, without the feel of acceleration. Then both will come down as you speed up (assuming of course that your speed pickup is on the counter sprocket, like on most new bikes, and not on the front wheel like the older ones. Should be easy to tell, just see if you have a cable going to the axle of your front wheel. If you don't then the sensor is in the counter sprocket).
if its a fuel or ignition issue, it should be worse with the bike on the stand (be damn careful about this, the bike can jerk as you get on the throttle, and if it falls of the stand with the back wheel spinning that fast, its going to be VERY bad).
If you feel sufficiently talented, it should be easier to make the clutch slip by dragging the rear brake.