I thought what's good for stocks tends to be bad for bonds and vice-versa. This news was allegedly bad for the bond market, so they shouldn't have been reporting on moves in stocks in any case, but if they did report stocks in connection with this announcement, they should say the move indicates strength in the bond market.
Second, S&P didn't reveal any original research or information, just their conclusion based on the same info everyone else already had. The only reason to care what they say is if they have a good track record. Let's see ... housing bubble, Enron, Bear Stearns, Lehman ... yeah, not so great.