I have never worn a sole out on any pair of VFF's... Over 1000 miles on a pair of KSO's before the fabric between the toes came apart to the point I couldn't patch them anymore. Close to 600 miles on my KSO EVO's with no visible wear yet... It is all based on form and breaking form that causes wear.
thats so awesome!! its one of the reasons i swapped to these over regular old running shoes those those just dont last.
maybe when my right foot decides to behave i'll have better luck. its annoying tho my right foot is a hair smaller then the left so some pairs of shoes dont work out as well for me vs others I love the v-runs there nice to run in but my foot slips aorund int hem some i compensate for this and it shows on the sole of the shoe. the other vibrams i have are not as bad tho my bikilias where. after 200 miles that right shoe was getting pretty thin in spots but the left still had a fair amt more life.
I think as my form and techinique improve i'll have more and more luck.