I totally agree that there is a fine line between interesting content, length of post and context. However, some things do have some structure. If we take as an example review of a video game, there should be a short description of what is it about, some game experience and useful data (system requirements, etc) and of course good summary with maybe some pointing system or recommendations - pros/cons, etc. It is much easier to make a few screenshots and write sure short "review" or rather just summarize other's people's reviews and wait for the reward. And if you ask me there is not much experience if the post has 350 words. I love to get some decent information from the post. Tell me something I didn't know, show me something beautiful... Give me some weight.
I look forward to Hive and I will do my best,
Cheers