Yes, you're right.
I was getting it jumbled up with the magnetic moment of the electron, which is predicted by the SM (well, the QED part anyway), to be slightly different to the 'classical' prediction.
Experiment measurement of this is accurate to one part per billion, and is consistent with the QED prediction.
The electroweak bits of the SM predict the W & Z bosons, along with their masses, which have also been measured, to around 1 part per 10,000, and match SM predictions.
EDIT: last but not least, the Higgs Boson was also predicted by SM, with a ballpark figure for it's mass, and other properties (how often it decays into photons, W bosons, quarks etc). So far all measurements of these properties are consistent with SM predictions.
I was getting it jumbled up with the magnetic moment of the electron, which is predicted by the SM (well, the QED part anyway), to be slightly different to the 'classical' prediction.
Experiment measurement of this is accurate to one part per billion, and is consistent with the QED prediction.
The electroweak bits of the SM predict the W & Z bosons, along with their masses, which have also been measured, to around 1 part per 10,000, and match SM predictions.
EDIT: last but not least, the Higgs Boson was also predicted by SM, with a ballpark figure for it's mass, and other properties (how often it decays into photons, W bosons, quarks etc). So far all measurements of these properties are consistent with SM predictions.