> Since I've had so little mileage,
> does anyone have experience with
> getting prorated on new Michelin
> tires?

As far as I know, there is no warranty on the OEM tires. They are sold with
the car without any wear warranty. That's one of the reasons for which the
car makers get their OEM tires for cheaper, they buy them with no warranty.
A friend of mine had his tires wear to wear out really quickly on his VW
Golf and his dealer replaced them for him, but it was VW and/or the dealer
that did it, not the tire manufacturer.

I'm an engineer and when I was at school, I did 2 workterms at a Goodyear
plant. So I know that the OEM tires are different from the ones you can buy
at the store. They don't seperate the tires into OEM and for individual sale
once they are made, they are OEM since the beggining of the manufacturing
process.
That means that, for example, a Michelin MXV4+ Energy sold at the store will
be different from the OEM one on an Accord, and both tires will be different
from the one sold OEM on another car.

On the other hand, I used to own a 2001 Civic and now have a 2002 CR-V. In
both cases the OEM tires were pretty poor. On my Civic, the firestones
lasted less than 20000km, roughly one summer. While my winter tires, lasted
3 winters and were still good for another year when I sold them with the car
(I bought them when I had a Mazda 626, same tire size, used them 1 winter on
the Mazda and 2 winters on the Civic). I was unsuccessful in getting any
compensation from my dealer or Honda.
Now, on my CR-V, I have 31000km. Around 20000km driven on the OEM
Bridgestone Dueller. I think that I'll have to change them sometime next
summer. Once again, my winter tires show almost no wear after one winter.