No reference will detail anyone's pilot skills because, first, a lot of that is subjective judgement, and, second, do you really want to take any unnecessary responsibility? If you say that X is an awesome pilot and he overshoots the runway tomorrow, can it be that the legal department will be after you because you gave an untrue description of his skills? On the contrary, if you write down that he was less than perfect and he doesn't get the job because of this, he can sue you for damage. That's why most references I've seen only contain plain and easy to confirm facts. Was employed from this date to this date in this capacity, flew that number of hours in his role, passed his last proficiency check on this date, had no formal investigations or disciplinary inquiries launched against him. That's about it.
And this is the very reason why lying about your background is not a good idea.