@JustOneDad
So on the first page of your data sheet they have a list of boxes that they check. Some examples are: DIV (diversity), gen one, legacy, office of development, etc. There were also boxes that said IMO and “no math”. My friend did not participate in IMO and got the “no math” box checked. His friends that did participate got the IMO box checked.
Edit: Just to clarify – I don’t think it’s more an important than anything else because my friend got in as a STEM major w/ no IMO, but it’s apparently of enough interest to have a box for it. Oh, one thing I do remember now is that one of the few full comments the adcoms made is that his interests/essays fit with his intended major.