Do you think Google rates avivadirectory highly? I don't agree with everything this Rand said, I don't agree with pagestrenght tools either. I just ran a test an a site that ranks number one for its chosen keywords over 73 million results and its got a measly 4.5 page score. Sorry blogmaster but serps talk not pagestrenght, ain't that a fact.
Erm since when has page strength had any relation to SERPs? Its like apples and oranges... If its an unpopular niche, a crap site with rubbish PS can rank high in G