No, it hasn't backfired. Apple made the statement they wanted to make, and got lots of mileage out of press reaction, blog commentary, etc. Mission accomplished. Now they will, I'm sure, issue a short direct statement in strict compliance with the judge's instruction. Good on Apple for clever manipulation of this absurd ruling!
It probably hasn't backfired because no one really cares, but I'm sure the admonition by the court will get more attention in the media then the posting by Apple did.
But again, at the end of the day, no one really cares, Apple will still make billions, Samsung will still copy and make stupid commercials, and both will be highly successful at their businesses.