It has to be a source thing then, because I'm hearing the same thing with the mids as Justin. Hopefully there's not variability in the product itself, because what I'm hearing is so obvious that I cannot imagine someone else NOT hearing it.
I'm running both straight out of an iPod Classic, maybe the p7 needs an amp to sound its best.
I will say this, the more I listen to the P7 the more I like it...
Listening to the P7 on the Fiio E07K makes it sound slightly warmer to me vs. listening straight out of iPod classic.