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I was reading it as you posted i think. :-)
It seems the kurt is accurate enough (though no better than TR).
miro_o-
IMHO. The inaccuracy is smallerthan the difference between riding outdoors, and sitting on a trainer indoors. So as long as it's precise. It's good enough.
The big difference is flywheel lag. You put in uber watts to get up to speed, and get the guy wheel turning. Which isn't measured. Then at the end of the effort you ease off, while the flywheel give you free watts.
I miss flywheel lag TBH. Made intervals easier.
Smallfurry
Worth reading the DCRainmaker review- although if you haven't got time for that (what I take from it is) he basically says that the speed+algorithm=virtual power providers are good, but lack the calibration function of the Kirk - so you go from an accuracy of +/1 15% to +/1 2%, depends on how much you value that accuracy.