[weego]

This sounds very much like the new version of "I can tell it's a rails app by how it looks".

The idea that the server tier language has a direct effect on the user at the level of code quality we are discussing is naive at best and trollish at worst.

[cageface]

Are you seriously arguing that all backend languages are essentially interchangeable?

Give competent team A six months to build something in PHP and competent team B six months to build something in any of the better options and team B will build a better product every time.

[ErrantX]

Do you have any evidence to back up this assertion?

Because I would imagine it depended a lot on the skill of the teams in question - and if evenly matched they would produce similar quality.