Post the link please. You have to give the author credit.
I think points 1 and 4 are fair.
1. The PS3 is currently overpriced in the face of the competition.
4. The PS3 is also not recieving enough marketing to help drive it.
As for exclusive games, that argument is old and outdated. The PS3 was, in my opinion, the best platform for exclusives this year.
As for Xbox Live, yes Microsofts online offering is more robust then PSN, but what boon was that to them last gen? Is that really an essential part of current consumers decisions?
In my opinion it comes down to price. Price and the fact that Microsoft are offering most of the big multiplats on their console aswell and are really adamant about letting the world now about it, via an extensive and strong advertising push in all regions.
The pendulum of sales has swung back in favour of the 360 this Xmas in the face of Sony holding back on a price cut. It will be very interesting to see what points do hold up if Sony do indeed drop the price of the PS3.