I’ve got a ’99 Schwinn Pro Stock, and when I got the frame, the headtube had a “Made in Taiwan” decal.
I also have a 96 Schwinn XS BMX. This one is made in the US, but I don’t know if it was made in Colorado. I would guess that they saved the really high-end fabrication for the mountain bike frames at the time.
As far as the S-Series full suspension bikes, I seem to recall that the reason they were designated the S line was due to the fact that they were fabricated overseas. They may share the Sweet Spot suspension, but they were heavier.