[Ducati] Question on fuel tanks and range between fillups

[mpmenard at comcast.net]

Given the notoriously inaccurate nature of the low-fuel warning light on Ducati motorcycles, I was wondering what type of real-world range anyone has gotten on the following:
ST3, 1098s, Monster S4rs
I get furstrated having the low fuel lights (or the gauge read low on the ST3) come on at about 100 miles, yet the bikes only taking 2 gallons of gas, implying we could have gone 200 miles.  Of course, I don't want to carelessly go 200 miles and run out of fuel.
So, what type of range has anyone gotten from these machines?
Thanks!
Beppe