Davey and 7E7 I prostrate myself at your feet. NO ONE, I repeat, NO ONE I was in the US with doing their MEIR managed to convert in less than 20 hours (5 sim plus 15 aircraft) and most took nearer 30. And that's finishing the course one week and starting the conversion the next on the same type of aircraft at a school with a very high 1st time pass rate. The 'summer' weather played a major part in that I accept, but I think a 15 hour conversion is an exception rather than the norm.
Do you mind me asking which school you went to in the USA?