Reported by whom? I've read most of what I've been able to get my hands on about Stradivari (not "Stradivarious") and never came across any such thing. Stradivari apparently had pretty tight control over production of his violins - perhaps one reason his shop discontinued when he died. It's extremely unlikely that apprentices did "most of the work" - that significantly overstates the case. Having said that, his certainly weren't the only hands that touched the instruments that bore his name, especially later in his life and career. It would be correct, I believe, to state that even the instruments from his so-called "golden period" were the product of a "workshop" rather than of a single induvidual start-to-finish. The point was well-made by RealFrames - the Renaissance "masters" also ran workshops. The signature of the master on the workshops productions was meant to indicate that they met his high standards, not that his were the only hands that created it. There were people highly-skilled with a brush in their own right who would even travel from workshop to workshop selling their special services - for example a special skill at painting backrground scenery or faces. People got all worked up here when I mentioned that David Tesch didn't do all the fillet brazing on his S-22 models - heck, the guy who did braze a lot of those frames was a genuine master in his own right. The concept of the lone master craftsman who would never allow a lesser mortal's inpt - from selection of materials to placement in the shop window - is largely a myth we, in our industrial and post-industrial culture, have retrojected onto earlier eras.
With respect to the Confente in particular, to me the issue isn't whether he brazed the frame. It's whether the frame is the product of his creativity with respect to design and details and whether it meets the high standard he set. If he oversaw and maintained ultimate control over the end result, and allowed it to bear his name, then it's a "Confente."