I tend to agree with both sides of this argument. After playing months of absolutely break-even poker I found that loosening up my starting hands has put me over the top in a big way.

That being said though, I don't think I would have been a profitable poker player had I been playing this "LAggy" all along. I see a lot of flops and win a lot of small pots wich make up for the pots I let go because i missed the flop. But when I do hit the flop with a big hand or a big draw I win a monster pot that would have previously been small.

If I had tried this when I started out I wouldn't have been able to play the player as well as I do now and take down the necessary pots to make this play profitable.