None of mine have ever had toddler milk and all of them swapped straight to cows milk when they were about 12-13mths and we never had a problem.
I agree toddler milk is a sugary gimmick...if you are worried about your toddler's nutritional intake something like pentivite would be more beneficial but most toddlers don't need it.

Except for my youngest who is still on formula at 15 mths due to weight issues.