NBI. Cultural exchange is not only one of the fundamental principles upon which the United Federation of Planets was built, but also among the purest expressions of IDIC.
If said cultural exchange were to reveal the innate superiority of the Vulcan species, one could hardly be held responsible.
Indeed, it would be an invaluable contribution to existing bodies of evidence demonstrating just that.
The TNG Technical Manual has another line that I think supports this general idea:
The combination of forces produced within the warp engine core and the flow of space and subspace around the vessel created the particular engineering solution to the problem of faster-than-light travel.
This seems to support the notion that subspace itself is bleeding into real space around the ship, at least to a degree.