I wish I could remember my St Andrews graduation ceremony better in terms of those who wore a kilt to graduation - I don't remember that many did to begin with.

Non-kilted men wore a white bow tie and winged collar but with an ordinary suit and then the black graduate gown. By the time you had knelt before the Chancellor and received your hood (and been hit on the head with John Knox's red hat!) the tie was fairly obscured in any case.

I have a pic somewhere - will have to scan it.