There's enough people on here who don't speak English as a first language, but still post legibly albeit with some errors. Sadly, there is also enough people who post content that's hard to understand because they don't care and are only interested in getting as many posts done as possible. Let me tell you from experience it is very easy to tell the difference.
Posts that you and the other members is who don't speak English as a first language are still understandable. A few minor grammatical errors and spelling mistakes isn't going to bug anyone. It is perfectly acceptable and isn't actually what makes there "other" people's post hard to read. It's more about thier post being structured badly and convoluted because it's the act of someone typing in a rush. The act of someone who hasn't thought it through and obviously doesn't proof read anything before posting it. I believe that you make fantastic posts, and you do, because you take your time. Just because the reason you take your time is because of language difficulties, doesn't change the positive effect it has. Hell, even as a native English speaker I can take just as long as you on a post because I'm a horrible typist and make errors all the time, but taking the time I need to get it good enough, just like you do, helps a great deal. You should have seen the mess this very post would have been if I hadn't gone back... twice.
I know you're disappointed that your request didn't gather the support you hoped in this this early stage (Ultimately, it's up to @DC, not me or anyone else, so you should not get discouraged anyway), but I can't be anything else but honest and I think that this is a fix for something that isn't broken. Give yourself a little credit, like I said the quality of the content you put on VGR from the very start has been superb. I could be convinced to champion for the edit window to be extended a little bit, maybe to 15 minutes, but I can't get behind 30 minutes, I'm sorry.