IMO, a lot has to do with the rigidity of the neck too. If you have a solid, rigid neck, the tension of the strings won't cause the neck to bow one way or the other, allowing it to hold the tension of the strings and keep the action nice and low without moving. Sure, you may have some natural adjusting to climates and seasonal changes, but, on an every day basis, you can have low action with a tight, articulate B string as well as an even tone across the fretboard.
This is what I think. I happen to really like the Lakland 5's (all of which I've played have 35" scales), but I have some good experiences with great sounding, balanced 5's that have a 34" scale (Music Man, Ken Smiths, and Modulus in particular). And the common factor in the great sounding 34" scale ones is a very well-made and rigid neck.
Don't use the 35"/34" to determine what's best for you. Just play the basses and go for the one that SOUNDS best to YOUR ears when YOU play it.
John
