Personally...I'm really tolerant. I'll point out mistakes if I can't understand it or if I find them amusing so both me and my partner can try to get a laugh out of it, considering it could be a typo.
But, if someone asks me to help them along the way, I will. I've had like 2-3 partners that aren't in this club, that PMed me when I was looking for certain 1x1s and admitted they stalked the thread. So, I offered to help them get in, and they also knew I was one of the instructors from the rp school.
Honestly, I suck at spelling sometimes too. I have a moment where I can't spell a simple word and I'm going "T_T I KNOW HOW TO SPELL THIS."
I think I'm tolerant towards everything. I know what it's like to be shot and/or put down because you aren't considered literate enough or whatever. But when people say it's my grammar? I highly doubt it, if it's not being pointed out by my English teachers. That's actually a crap reason to give me. (It's happened before .-.)
But, I'm not the kind to put lots of overflowing details and emotions or thoughts. Most, if not all, of my characters aren't the types that reveal much. Truthfully, if I see a super long post, I'll probably skim to see what interests me, read that first, then force myself to read the rest. Unless you drag my attention in from the start.
I don't like it when people are afraid to come to me for 1x1s. I'm always open to them, especially if it's a member from this club ^^ (btw, this is me, trying to coax people to do 1x1s with me sublimely [did I even use that word right? It was a word I learned a couple of years ago T_T])