I just got my 6.5-20x40 VX-III back from Leupolds custom shop this Wednesday, they installed turrets for me. I shipped it out on a Monday two and a half weeks before, so it took 13 business days if you count the shipping both ways. It was all relatively straight forward, and I am very happy with the service. I really like the turrets too, they are significantly nicer than the turrets on my Nikon Buckmaster, and way, way better than trying to make regular adjustments with Leupolds standard "field" knobs.
Also, Primier no longer works on any Leupold scopes. Check Premiers Homepage
, and Leupolds Statement
Good luck with your decision, if there are any specific custom shop questions you have feel free to drop me a line.