Someone helpfully posted a thread for TrueDelta's reliability survey, but in the title specifically mentioned only the 2007. Which might explain why 2007 is the only model year for which we've had a decent sample size.
The survey actually covers all model years, and we'd love to have precise stats for all of them--just a matter of getting more owners involved.
Participants simply report repairs the month after they occur on a one-page survey. When there are no repairs, they simply report an approximate odometer reading four times a year, following the end of each quarter.
To encourage participation, participants receive full access to all results, not just those for the Tacoma, for free. I'll share results for the Tacoma in this thread after each update.
For the details, and to sign up to help: