Imm experience is subjective. It sounds like they are trying to come up with some standards, now that it has much more value than a bit of a leg up on a level, but it's always going to be up to the individual imm to make a call. One thousand exp is what seems like the new standard for roles they really liked, 500 for everything else.
You did get feedback in the comment "a general lack of character info", maybe it wasn't all that informative, but here's how I would read it. A lot of people write decent stories for a role, but it doesn't in any way give insight into what the characters motivations are. Why did you join the guild you are in, why are you good/evil/orderly/chaotic, etc.
And whenever I hang with my former college buddies, you'll hear someone say "wipe the sand out of your vagina" pretty regularly, so it's a common way to rag on someone acting like a pussy (maybe it's more common in a testosterone & beer charged group).
I didn't see the imm being insulting in any way until after you pulled the delete trigger, and I also don't think it's that big a deal, but that could just be me. You have to remember that they deal with people begging for imm experience, a lot now. Either by asking on the newbie channel or posting on the forums (probably praying to). They gave it out too frequently and now everybody that writes a roll basically demands imm experience. To me, the solution would be to have imm exp not give edge points, and the imms can reward rolls & rp behavior with edge points behind the scenes. The problem with that being, the lack of knowing what you got rewarded for is less likely to increase good behavior, and the lack of transparency will lead to the same old crowd crying conspiracy