[breck]

Popularity is highly correlated with quality.

Given that A is 10-100x more popular than B, what are the odds that B is "better" than A? Slim.

Now, popularity does not imply that something is the best. Often times there is something better that isn't as popular. But generally the popular thing is better than most alternatives.

[dvhh]

Popularity is no correlated with quality, more with "good enough for the price".