No. For poli sci, I only applied to two Ivys, and only one of those is T10. The other is in fact ranked lower than the non-Ivy I was accepted to. Additionally, I cannot find evidence that the lower-ranked Ivy accepted/waitlisted anyone for my subfield at all.
Perhaps in a different year without the sudden funding worries and seemingly low subfield admission numbers, I may've been accepted into an Ivy. (Moreover, so many programs saw a huge increase in application numbers, which does not help). Or, I simply did not fit as well, was less competitive, my statements did not resonate there, or any other reason.
Either way, I feel as though my disclosure was either neutral or slightly positive for my applications overall.