Back in Dec 2002 I bought an RG 520 QSTB. It is a 1999 model and had been sitting in the store for some time.
My point? I'll get there . . .
The guitar, while dusted and polished (after it came out of storage) simply sat near a plate window, sun shining on it most days, never set up, I was told it was almost never touched, still had the stock strings on it.
The guitar kind of called to me, I'm sure some of you understand this . . . but being it had been in a store-room for a couple of years, then set on a shelf and never really checked over, I expected MINOR problems with setting it up, if going from a cold store-room to having the sun shine on it daily wouldn't cause some problems, I think the only other thing would be tossing it into a wall . . .
My point . . .
After a proper set up, I could have gone with 1mm action across the board with (almost) no buzzing or choking, the frets were VERY well set and level. Totally stock AND after sitting all that time, cold/hot/sun.
My 1990 RG550, while I don't know it's history before I bought it (pretty much picked it up right after they put it on the rack) it too had almost perfect frets. Back then all I cared about was low action and would go as low as I could without choking and, if memory serves, I had it at about 1mm across the board. Of course it's 14 years old now and I've never leveled the frets, but I have my action much higher now so as long as it's not choking anywhere, I'm not going to go through the work.
I've set up quite a few guitars for friends, and usually manage to talk them into Ibanez when they are looking for something "different". Actually it's the guitar that sells them on it, not me, I just suggest it . . . but I digress . . . and all of them have had pretty much good fretwork. Only a few times (in about 25 or so guitars) have I had to file a fret or two because of choking.
Of course Rich does this MUCH more often than I do, so he'll have more to do since you WILL have some slip through with a high fret or three, but I digress again . . .
Check out the frets on a Mexican Strat . . .
I've also set up a few Gibs that REALLY needed good levels, beyond my skill to do as the entire board had to be done . . . I'm NOT doing that on a $2500 guitar with binding on the neck . . .