EDIT: This is MSA, not county.
Chicago grew 1% from 2010 - 2014 effectively bringing in 93,061 people.
Denver grew 8.3% from 2010 - 2014 effectively bringing in 210,664 people.
Let's just go down the list percentage to actual population growth from 2010-2014:
Houston: 9.6% - 569,690
Los Angeles: 3.4% - 433,287
Seattle: 6.7% - 231,663
Austin: 13.2%: 226,996
San Diego: 5.4% - 168,123
Minneapolis: 4.4% - 146,319
Portland: 5.2% - 122,236
Philadelphia: 1.4% - 85,802
United States of America: 3.3% - 10,098,951
Even at 1% that's a whole lot of people still trickling in there. You can look at percentages all day but 8 times the percentage only equals just over 2 times the growth.
All hail growing Denver! It's perfect here and the market is great!