I know someone who is in their late forties (with a previous undergraduate degree) who is in his last year of medicine right now. He is absolutely
loving it at this later stage in his life! He has a completely different perspective on things
I also know someone who is applying to get in for the next year who has been out of school and working as a professional for about a decade; again, a totally different perspective on things.
I think people are absolutely correct in saying that one has to do a lot of minute digging to find out the ins and outs of each school. I did see a PDF here at Macinsiders that gave a breakdown of who got accepted into med school at McMaster this year -- unfortunately I have no idea where I saw it!!! Sorry!
Best of luck to you!!!