A better way to put it would be to say all of the UK tabloid papers (the Mirror was also mentioned in the article).

Tabloid journalism doesn't exactly have a stellar history of responsibility. Unfortunately this sells for some reason.

Is the Telegraph really a tabloid? It's hardly on the same scale as the others presented here (and in the article).

The Telegraph is a broadsheet, yes.

However, I've seen some rumblings on the Internet that it used to be high quality journalism, but lately it had been going more downmarket of late. This is "Internet opinion" of course, so I'm not sure what the real truth is. That being said, if they are engaging in tabloid-style stunts like this these day, this would sort of confirm what I've read.