I wonder how accurate that really is, however. Many of the older Roadsters are at 7 years now, and mine is at 100K miles and 6.5 years. I have about 87% of the original capacity. I suppose there could be a rapid decline over the next six month, but that would be pretty uncharacteristic for the car so far. I suspect that the 7 year number will turn out to be conservative just like the 100K one was.
I guess we are about to find out! My #33 was built on October 6, 2008 and has had no drivetrain replacements (other than PEM line-in fuses).