I haven't had time to read all the responses (but will do) but wanted to add my tuppenceworth.
I am an English graduate, working as an LSA in a "better" comprehensive. I wanted to do a PGCE but the kids got in the way, and now I am glad I didn't as secondary teaching in English is a lot less fun than I expected.
I have not seen any teaching to a standard as low as the article describes in the school I work in - and I see many different teachers.
I didn't finish the article so I don't know whether the author got her PGCE or not, but the tone of the article struck me as "I failed my PGCE, it was everyone's fault but mine and this is why." Apologies if she passed!
She describes being told off for teaching semi-colons the wrong way, and seems incredulous. But she was given a lesson plan to follow and didn't follow it! What did she expect? A PCGE student not following the lesson plan she has been given is unlikely to be greeted with: "Wow! That was SO much better than what we asked you to do! We must all resign!"
I won't go on.
There was a poster who described the "17 year old boy who was having terrible problems. He couldn't get a good job, and he couldn't go to college because he couldn't read properly." and who had 7 GCSEs. I do think this is a problem. If reading and writing is not cracked early it is hard to improve it at secondary level as there is not the time. The student in question probably had a reader/scribe for his literary difficulties and that was why he had passed 7 GCSEs. The fact that he had not been able to access literacy support at college would imply a lack of pastoral care somewhere along the line - it is certainly available.
Ref GCSEs. I sit in on plenty. Getting easier? Maths - God yes. You never hear about Genius 7 year olds passing Maths GCSE any more do you? It's too commonplace. My bright 7 year old could pass the lower level GCSE (with coaching).
English, though, I am not so sure. I remember one essay question from my English Lit O level of - ahem! - years ago. "Who was your favourite character and why?" Hardly taxing. I sat in on an Eng Lit poetry paper this year and looking at a question with 18 marks relating to a particular poem, reckoned that I would struggle to find 18 things to say about that poem. Or even nine things, if they were throwing the marks away.
In summary, in my opinion, there is no need to despair.