I can't speak for "most" (and, IMHO, neither can you), but I routinely beat the EPA fuel economy on my Prius C by about 5 to 10% and I expect to beat the Bolt's EPA range by a similar amount in my typical driving. Yes, there are certain places I go where I don't expect to get that range, but on the whole I think that 238 miles (383 km) is going to be eminently achievable for me.
On a long trip the typical Volt to Bolt convert will see 250+ miles on a charge if he pushes it... but most people will get range anxiety if they push it past 200 miles without re-charging... and this is the only place your comment makes sense. If you stop and re-charge at 190 to 200 miles because you "only" have 50 miles range left, then I agree that most of us will never see 238 miles. If you were saying that the typical Volt to Bolt convert wouldn't be able to drive 250+ miles if he knows there is a fully capable DCFC charging station at the end of that 250+ miles I would have to disagree.