In my travels, I've noticed play areas appear in many places in airports, including lounges, which I think can ease both parents' and other passengers' stress over traveling with kids.
That said, I do not think it's only smaller children that need entertainment. My sister was concerned about traveling SoCal-LHR with my 15 year old nephew this past summer - boredom and hunger being key concerns. Wifi was a huge help in keeping him entertained during a long layover as were adequate food options.
The list includes MCO - not sure there's any surprise with this considering traffic to see Mickey, Shamu, and the rest; DTW; SEA; MSP; DEN; CLT; MIA - article claims easy access, but that's not my sentiment over MIA; DFW; BWI; BOS; PHL; LAS - should children be there?! ; PHX; and JFK, which I'm not sure is anybody-friendly!
__________________ 2013 TATL/TPAC: DL: 12; AA: 6 U/G: DL: 5/7 AA: 3/3 Have you seen Floyd the Flamingo?!
Please keep in mind that any airport which isn't swamped in high season will automatically be more "family friendly" than one with heaps of crowds everywhere. These polls can be interesting but bear in mind, people often compare airports in different cities in different times of year.
Also, bigger airports are automatically better if you have to spend any amount of time, says mom who was once stuck in a tiny airport for 9 hours, waiting for a one hour flight thanks to a mechanical... in the rain...