I don't think so. I'd say they're amongst the more tank-like of any composite frame ever made actually. They're really dense in their construction which is why they have that particular feel.
I've never broken one in over 25 years but have broken Prince Orig Graphite and Donnay Pro Ones on a couple of occasions. One of the Donnays even broke from a bad framing of the ball.
Original Pro Staff 85, leaded to 370g, hybrid poly/syn gut set-up, 48-52-ish lbs.