Can't say I've noticed any difference either way, to be honest. I have weeks where I'll drink all my weeklies (I say drink, as 49pp nicely covers 7 pints of cider), and weeks where I'll leave them and stay sober, and I'm tending to lose in either case. When I'm getting a sts or a gain, it's when I've gone over on my points completely or eaten bread. Bread makes me gain no matter what I do otherwise, but that's a different story entirely.
At the end of the day, no two people are going to be the same and you've got to decide what works best for you.