I get the feeling the only truly reliable way anyone can really get a feel for the difference between two different mic pres would be to track the exact same song twice in a row . . . on the same day, in the same room, etc etc. . . . with the only difference being that you unplugged the mics from preamp A and immediately plugged them in to preamp B with levels matched as close as possible, etc. and tracked it again. I really don't trust the splitter idea, as that will inevitably affect the load the mic sees.
It would easily make for the most valid possible comparison anyone's made to date, albeit still not perfect. And I'd be willing to pay money for it (if someone would put it on CD) a lot sooner than I would those silly "Boston Pre Party" CDs or that 3-D Audio thing.
In fact, if anyone had the motivation to do that, I think you could make some decent cash. In fact, I'll be you're first customer and will gladly pay in the neighborhood of $25 or so. Just a thought.
No disrespect intended, as I think this is all great, and I love the fact that we're sharing stuff we've tracked with various mic pres . . . highly encouraged.
But if we're going to do it, let's be sure to do it right. I think we're deceiving ourselves, or overestimating our ears, if we think we could tell that we liked MicPre A better than MicPre B, because we heard a sample from one guy a while back who used
A and we thought it sounded far superior to another guy's work who used
B. Again, no disrespect, but it's rather foolish.