Failed, I think. As of 104, it looked like his Christmas plots were all going to succeed - the Ravenclaws and Slytherins were in the process of tying for the Cup, and raising the popularity of Harry's anti-snitch proposal in doing so.

It is only the revelation that "Professor Quirrell had gone out to face the Dark Lord and died for it, You-Know-Who had returned and died again, Professor Quirrell was dead, he was dead", which Quirrell would not have planned around, that threw a spanner in the works by motivating the Slytherins to seek outright victory.