Personal experience with string-throughs (though not Fender) has been tone with more body (pun halfway intended) and more sustain.
To me, it's the same concept as an aftermarket bridge (on non-string-thru designs) such as Badass or Babicz or even Fender's HighMass; more material on each end of the strings=more sustain and ballz.
At the other end of the (string) scale, there's a couple of companies that use metal flourishes on the end of the headstock, and I think it's Fender that has a clip-on aftermarket headstock piece to add mass (and sustain), though I'd have to expend the enormously exhausting task of checking Google or Ebay for the name of the piece.
For the record, my huge avatar is NOT overcompensation
Last edited by Josh Thatguy : 01-09-2013 at 08:32 PM.