Scoble writes about the two minute email rule:
I love this new two-minute rule for email from Eric Mack (delete all email that takes more than two minutes to answer). I woke up today to find 48 new emails waiting. Damn, and it’s Sunday. Imagine how many I’ll have on Monday.
This is the problem with answering email — it generates more email.
Marc Smith of Microsoft Research calls the standard time based sorting of email clients the ADD sorting. This two minute rule is the type of thing that makes me recoil in shock and give up hope for a sane future for my daughter. Shouldn't we be removing email that takes less than two minutes to answer? I feel that something that doesn't require attention to interact with is worthless - I'd rather spend my time engaged with concerns that require real thought! Remember, if you get a reply from Robert Scoble it means he hasn't spent any time thinking about the answer.
What I think is really going on here is that for some reason email clients have never provided any real tools for content analysis and management - the market is actually wide open for some quite trivial new functionality (this is what happened with desktop search applications).