Easy to spot the difference between genuine feedback and cut n paste jobs. The genuine ones comment on some specific features of the session and have a personal "voice". A girl I trust said that she only leaves generic feedback because if she doesn't, clients get jealous! Some of the hyperbole is mildly embarrassing. But even if it's OTT, good feedback means you're not a complete arse and is genuinely useful in getting further bookings, so it does have its uses.