My experience with these pilots:
I have flown with a few guys who couldnt fly or even manage the aircraft and passed an LPC 3 weeks before.
One guys tech knowledge was so poor for example he suggested speeding up above 250 kts at FL70 to get kinetic heating on the pitot probes..just for your interest it was a left elev pitot that failed and the QRH suggests avoiding icing conditions.
Two other people I have spoke to didn't even do a raw data ILS or a non-precision approach in the LST and that is a requirement for the issue of a TR.
From what I have been told from a certain line training provider is that they have found a trend with pilots who have passed a TR with around 40 odd hours total time in the sim and/or come from cockpit4u, for this reason Royal Air Maroc who did a line training scheme have boosted there requirements to 40 hours pilot flying (80 hours total) to become eligible for line training.