I'd love to know where you got your information alphagear. According to the EU rights clinic blog
http://blogs.kent.ac.uk/eu-rights-clinic/, it makes clear that the uk government still considers it necessary for the uk citizen to prove "centre of life" and goes on to say:
"As a result of this continuing discrepancy between the EU and UK rules, family members of British citizens residing in another EEA state are therefore encouraged to apply for an EEA Family Permit before travelling back to the UK."
If you have something more up to date like some government advisement or trustworthy sources, please share them.