The article takes an edition war cheap shot with the "4e entitlement" comment and then Shea has comments turned off to avoid edition wars? I'm disappointed in you, Mike.
You could say that a 4e player may have certain "assumptions" about encounter balance based on how such things were handled in 4e. And they found those assumptions were mistaken when playing 5e.
But to use the term "entitled" is derogatory. It implies they are naive or stupid, expecting something they don't "deserve". If that truly is the attitude of your players, SlyFlourish, then thats YOUR failure as their DM.
I played old school. I crushed B1 back in the day through clever play and tactics. I survived original Tomb of Horrors. I have TPKed parties in 4e as well. I assure you, none of my 4e players feel "entitled" to anything.
My enjoyment of 4e doesn't come because I feel "entitled" to anything other than having a good time with my friends. I like 4e because I like playing a well-designed balanced game that encourages cinematic heroics and smart tactical game play. I expect I will enjoy 5e as well. But I don't need to tear down another edition or the people who like it to say that.