Vivid tables of experimental results in Latex (2)

In the discussion about tables in Latex, Eduardo's and Mico's suggested some improvement over the tables. Here you can see an updated version of the same part of the table. (I know, I change a number. There was a mistake before).

I've removed vertical separators and most of horizontal lines. I left a few to separate results over the same family of problems.

PS: I tried to add this to the same post doing some tricks. The editor of posterous does not allow to add pictures. So a did a new post (through email as usual), a then copied the nasty coded posterous uses for links images. I didn't work. So, Ok, new post.

Tabla-nueva