Yes and I'm absolutely agreed with you. I would go a bit further and say that, that might happen even between native English speakers.
I had the chance of spending a whole summer in Scotland and if something I learn from that experience, is how different can be two cultures even if they share the same language.
Good comment Erik :)
As a non-native English speaker myself, I have to say that I had had the opposite experience. It is just anecdotic, but once I let know my condition as non-English speaker and beg for patience, the general feedback is positive. I have the feeling that since I am not confidence with my English skills to redact a comment quickly, I tend to check what I've written several times, which would result in a decent text in terms of language.
If that were the case, the condition as a non-native English speaker seems like an advantage. What do you think?