First off, I have spent quite some time in Minneapolis/St. Paul - there are far larger design hotspots elsewhere in the country.
Secondly, You’re quoting my reply to another poster quoted message who made the comment about the cold weather. Make sure you’re attacking the right person.
They will be grouped together for the most part. Open up a lot of magazines and you will see they originate mostly from the cities you mentioned. NYC - most mags come from there… naturally they need a lot of print and add support.
So you really hit the biggies… between NYC and LA.
Some other locales with top tier addy companies and decent amount of publushing would include this grouping in no order:
Minneapolis
Miami
San Francisco
Austin
Washington DC [all the government / museum work]
If you are relatively entery level… just find the best job available in one of those markets including the biggies - then go from there… you are never locked to 1 location.
…or research eash location - see if you like the people, geography, weather, cost of living, city layout, etc… in the end this will have more of an impact on your life.