gracesmum I appreciate it's what you write that matters but, actually communication is what matters. It evolves. The rules of English Grammar, at this level, matter not a jot in the wider world. I have many emails from people for whom English is not their first language - as long as I can understand the meaning that's fine, I don't 'mark' them.
For many people speed is of the essence - my style of writing has changed beyond recognition - from the days of learning the 'correct' salutations and endings' in a typed letter to the emails of today.
I would personally hate children to go through the English Grammar torture I went through and would much prefer they learnt a love of reading.
I did score highly but my point is, so what?