I was the austhorised warranty repairer for Gibson for a period of six weeks. In that time I did 47 guitars, and billed them $2800. I figured I'd see a couple guitars a week, max. They sent so many guitars to me, I asked them to stop. About half the issues were simple electronic problems in Epiphones (jacks and the bridge tone controls earthing on the semi shielded cavity) worth $10-20 to fix up. The other half were USA built, and major issues... nuts cut so low that the strings fretted at the first constantly (two were $10,000+ customshop specials), horrendous 'plek'd' fretwork, a couple bridges located in the wrong spot, fretboards lifting, binding paint cracks, etc etc. There were also about 8-10 guitars which were rejected under warranty (one was a strap button thread stripped out, causing the guitar to fall and snap the neck).
As a comparison, I also (at the time) was doing all warrantys for ESP/LTD, Taylor, Martin, Maton, PRS, Warwick, Ernie Ball, Dean, Peavey, Ibanez, Roman, Schecter, Yamaha, and a bunch of others (pretty much everything except Fender). All those brands combined, amounted to 2-3 jobs a week. To compare Gibson to PRS... Ive been doing PRS since signing up in 2005. In the 7 years since then, Ive had ONE phone call for a warranty claim, and the guy never actually showed up.
EVERY USA Gibson that comes into the shop now for a setup, I recommend a fret level straight up. If it wasn't for Gibson, my income would be a fair bit lower than it is. I hope they don't change a thing! But, if they did, I might get more work done...