I'm here to make an inflammatory statement.
No one is going to agree to an arbitrary "standard" for pose frequency just because you post a poll, just like no one is going to agree to a pose length standard.
Trying to force an agreement on the thing is already a little exclusive side, especially when I hear people talking about how there's no new blood in MU hobby.
Instead, the expectation should be: "Discuss expectations beforehand."
Then you don't have to be silently resentful of your RP partners. If parties don't agree to expectations, you don't RP with eachother. No one gets mad because expectations weren't met.
This is why I sing the praises of ARES games, just like @bear_necessities. I can play scenes at my own pace, and I'm very clear on 'These are my activity times, I'm at work, so I'll be slow'.