Only if the difference is as large as some claim. But if you (as a side effect of choosing a cheap soundcard) limit the experiment, you'll only have proved anything if you hear a difference; if you don't hear a difference, one can always blame the limitations of the experiment scenario -- this happens in "real life" science as well as arguments on bulletin boards. It's called "experimental error", and in order for an experiment to have interpretable results, your standard deviation must be well within your ability to account for it. There are plenty of websites to put it up: MediaFire, YouSendIt, zShare, SendSpace.