Thank you, just sent you a donation.

Looks to me like keeping the coins is the norm. 2011 is too recent to judge, but it doesn't seem like people who mined in 2010 broke the trend, even though profitability increased. So I think the fact that 2009 coins haven't been moved doesn't tell us that they belong to an individual or small group of people (we know it a-priori, since there were fewer miners). All miners seem to think of it as a long term investment.

Now, it would be nicer if everyone spent their coins more often for services, but I can't even persuade my close friends to do so. It's way too off-topic though.