I've found The Erotic Review to be very reliable. I've seen ladies based on positive reviews there, and enjoyed very positive experiemces myself. I've also been in agreement with reviews of ladies I've seen without checking out TER first.
If there are several reviews of a lady, and they are reasonably consistent, that's a pretty good indication that they're truthful, especially if most of the reviewers have a relaible track record.
TER is no better and no worse than other boards in that respect.