I went through the college admissions process last year, and I specifically asked this question of all the colleges I was considering (admittedly, still a small subset) and they all said it’s the level completed that matters. I am sure there are one-offs who only count years in HS, but I don’t think that any of those are ones that require/recommend 3+ years.
Well, what do you know, you are correct for UDel, although they also only require 2 years.
http://www.udel.edu/admissions/apply/
However, the dagger only follows the required, not the recommended. Make of that what you will.