Should it be harder to hit Top Match?

Definitely. Maybe on the basis of how much one listens to a particular genre, or a group of similar artists. I don't know how you'd manage something of the sort though

Is there a distinction between 'Great Match' and 'Top Match'? If so, it seems pretty tough to find anyone fitting the 'Top Match' criterion for me :p My listed preferences contain a diverse collection of musical genres & artists (although my taste is quite specific within that), but maybe this high variance is causing Top Match to become realistically improbable.

Moreover - is the algorithm you use relative or absolute with regard to whatever metric you use to represent the 'degree of accordance' (or whatever) of any two users? I suppose it's probably a hybrid algorithm depending on the output of some classification function, but it'd be nice to be able to adjust the algorithm so it returns the top x% of matches from the user population, or so it returns all users over a y% score to be in the 'Top Match' group, maybe just a sliding scale marked 'granularity' that alters the 'Top Match' inclusion criteria (because this is just what you want to spend your valuable time doing, appeasing the pedantry of a pompous big-data analyst :D)

in fact we don't know what anyone else does on here. For all we know @MissNotorious is on the FBI witness protection program or is a secret spy and thats why she's notorious. Shouldn't we say what we do? ...just sayin

so from an engineering standpoint your algorithm or pattern matching formula pairs two people, right? what decides this? music? if music how? by genre? by age? by geography? what if they don't complete their music preferences? what about the non-music questions me and alot of other people filled out? where do they fit into the whole picture? my glass half-empty view: its way too difficult to so-called "match" ... whether its Match, Facebook, or Tastebuds

Yes I agree that it should be more difficult to get a top match. P.s. I'm excited for the iPhone app!

Yes. There are these cult bands/singers pretty much everyone put on their profiles and I seem to be 'top' match with pretty much everyone on this website as I listed a fair amount of artist on my profile.

Why should it be harder ? If its special then a message should pop, message that person, or a star.....

Last.fm has more data. They have a record of not only which bands the user listens to, but also how much they listen to them. They can prioritize bands based on the percentage of listens when matching with other users. Here every listed band has to be weighed equally because there is no listening data.