Let's face it, with any show like this, it's all about the judges and what makes good telly. At the end of the day, if a couple of the finalists sell a few records then so much the better for them but that's not what it's really about.
The whole voting thing (last week and tonight) was completely political. Both Louie and Sharon want Simon out of the competition, so they need to get rid of his groups - if they get the opportunity, that's what they'll do.
Sharon didn't really NOT want to make that decision tonight - without either Louie or Simon saying anything, she had already made her decision - but it wouldn't have been as compulsive viewing (nor got her more popularity votes which is what Sharon 'I love being famous' Osbourne is all about) as dragging it out and making out like she wasn't gonna choose. Her mind was made up as soon as she knew the decision was hers!