I can't attest to the running of just water wetter and water, I've heard the lubricity dismay as well,
for what it's worth, try running the mix (listed on back of bottle) of antifreeze, water , and the water wetter if your set on it. This is reccomended for street use anyway, and provides the lubiness of the glycol and the freeze properties as well. Also as I stated, I've noticed gret differences on 4 footed vehicles, not yet on 2 wheels... but will be soon..
as far as cleanliness goes, on cars, I've installed a few radiator upgrades, the ones that ran the longest on stock stuff, or normal coolant were a little more gunked up than the ones who ran water wetter anti mix for duration... although, I don't know the frequency of flushes in either, but assuming with vehicles under 60k miles, they hadn't been... I dunno if the wetter made this difference or not....
Wouldn't it be nice to have a shop and all the financing to run odd tests such as these??