First of all, these PSUs that you call mediocre, I would call "good". I'll grant you that the top tier PSUs are better made, so let's call them "great". The thing is, these "good" PSUs are already good enough that for the vast majority of people they are not going to notice any difference between them and the "great" ones.
So it makes little sense to pay double for the "great" ones unless you really want the box to say "Corsair" on it, or you want bragging rights about your ripple being 2% less than the other guy, or your heatsinks 10% more massive, or whatever it is that you guys claim makes these PSUs so great. It's like the difference between a $40 and $80 hammer... the $40 one is already high enough quality that it will do the job just as well as the more expensive one.
So it bugs me when I always see folks here trying to steer people away from good, reasonably-priced PSUs like the modular OCZs, for example. What I see is that you try to scare people away from them by calling them "mediocre", or more often just outright saying or suggesting that they are crap. 95% of the time you want them to buy a Corsair, usually for double the price or more. It's gotten to the point where anything other than Corsair and a couple other high-brow, expensive brands get called "crap" around here... even Antecs are starting to be called crap now, which I think is a quite funny.
This whole idea that everyone needs to buy an ultra-high quality, expensive, overpowered power supply, sometimes amounting to 20% the cost of your entire build... that all started with you video card enthusiasts. The thing is, you are the same guys who were pretty easily convinced by the video card companies a while back that it's perfectly acceptable and normal to pay $600 for a high-end video card. Now it seems that the power supply companies have done a bang-up job of convincing you guys that everyone should be paying exhorbitant prices for power supplies. So excuse me if I question your advice to buy a $120 PSU for my $600 computer build.