Heres how I interpret this poll (as of 8/31/12)

A total of 116 respondents report under 20k miles. 6 have had failure for a rate of 5%

A total of 70 report having reached 20-40k miles. 22 have had failure for a rate of 31%

A total of 19 report having reached 40-60k miles. 9 have had failure for a rate of 47%

2 have gone over 60k miles, both failed. 100%

Would be interesting to build a chart using exact mileage. Looks to me if you get to 40k, your days are numbered.