Solo mining is undoubtedly better mathematically, but you could mine for years without ever finding a block and I just can't see that sitting well with most people.
The alternative is heating and noising up your house for a wimpy 0.72 BTC a day on the same assumptions. That's really not worth the hassle.
On the other hand, I have switched 1 week ago from pooled to solo mining, after earning 3 BTC in total, the hard way. Today I have 53 BTC in my account, that's really worth the effort. The big profits make you smile. IMHO, a trickle profit of <1 BTC really isn't much more satisfying than 0 payback and the chance for big cash. That might be interesting for kids converting their parents' electricity to cash, but not for me.