On mine bergs I'd say it was pretty much central.
Using a steel rule, I get 5.25cm near enough both sides from imaginary centre line of s/a tubes to inner flange on rim (alloy) next to tyre taken at the g'box 'end' of the wheel (which is an easier measure for me than further back). Seems pretty stable wherever I position the wheel, so that seems to have a reasonably true rim at least.
From the rear, the wheel also looks to be on the centre line, give or take any tiny error in chain adjustment on my part, or deviations from square in the mudguard department. Runs hands-off pretty nicely, if that's a useful guide. If you want me to measure anywhere specific, happy to try.