Observation, I quite like a lot of Stern's stuff. I don't want 'faux' heritage everywhere, but done well it has a place; Done well it's not really faux; excepting modern building codes and amenities.
I think Stern more often than not gets the details right; the material pallet etc.
But in the link @interchange42
posted above, you see three prominent garages completely out of keeping w/the style being emulated; or good design of any description really.
There are proportions that are off, the building doesn't end up conferring a feeling that you are looking at a building from the period superficially portrayed.
I realize, a lot (most/all) of that is on the client. But I wouldn't want to take credit for that.
I think Wengle's modernist designs are better, consistently, than his period stuff.