Time is of the Essence

What is our expectation of email response time?

It varies depending on the relationship:

• Friends: immediately
• Co-workers: within a few minutes or an hour or so, depending on the conversation
• A company you're partnered with: within the day.
• Inquiring about a new business relationship: within the week
• Customer service from a vendor: yesterday

Woh - oh, what I want to know, where does the time go?