Interesting. I never heard that from my surgeon. I'm not a smoker, but I to enjoy a cigar on the river with a good barleywine or whiskey.
The stuff I just saw on the internet, appears to be a rather simple matter. Smoking constricts blood vessels, reduces blood flow, ....less calcium get's layed dow. Areas that need more calcium, like a new hip, doens; get what it needs. I also read that alkaline phosphatase, the Ca moving enzyme, increases with nitcotine. I'd stick with the fact that blood flow is reduced and keep it simple. I'm sure there is lots of complcated blood chemistry going on there, though, and everyone's chemistry is a little different.
The effects of smoking a cigar are very obvious on me, if my hands get cold from one cigar, I would be thinking about my hip. If my hands are cold, then maybe my hip is not getting the nourishment it needs, even for a couple hours or even 30 minutes. During that early recovery, I don't think I would want to limit even a little bit of nourishment to the hip.