It absolutely disproves the statement "McDonald's where minimum wage is $15 don't really charge that much more than the places where it's $7.25"
McDonalds charges >50% more in this comparison of $15 vs. federal minimum wage locales.
I'm not making any claims whatsoever about why the price is higher in NYC. I just want people to stop relying on the canard "McDonalds prices are similar everywhere" during this debate.