Hello. When switching from my 612o to the Telecaster last night, I couldn’t believe how fast the strings felt on the Tele. They are whatever Fender puts on the American Pro II series. What is puzzling me this morning, is how slow the D’addario 10’s are on the Gretsch. I’ve only had the guitar a couple weeks, and the strings went on after I polished the frets and cleaned & oiled the ebony fretboard with Dunlop F-1. When I slide my fingers up a fret on 5-6 it takes a fair amount of effort to make the strings ring out and sound like it should. Maybe I’m not a D’addario fan, but these are new. The fretboard does not feel sticky, nor do the strings. I always pre-clean them with Fast Fret and wipe down after playing. Fortunately, I have a decent selection of various string styles and sizes, so I will probably swap them out. I had D’addario’s 9’s on my Strat briefly, and didn’t care for the feeling. The caveat here is the 6120 has a Tru-Arc compensated surpentune bridge that is made for strings with a wound G. I’m having trouble online finding a different brand of 10’s with a wound G. The guitar came with a few sets of these.