No serious scholar of the science fiction genre ever uses the term "sci-fi" as an abbreviation for "science fiction". The abbreviation is always "sf" or "SF". The use of "sci-fi" (or any variants such as "sci fi") is still considered annoying or even offensive by many people. Perhaps that is passing, as the term takes over in the popular media, but I for one find it horribly grating whenever I encounter "sci-fi" in print. I particularly hate it when editors change my own use of "sf" or "SF" to "sci-fi" wihout consulting me - so I find out only when whatever I've written is actually published that I have (seemingly) written something that grates my own ear.
This has been happening to me quite a bit of late. Well, at least twice in important publications in close temporal propinquity.
And publishers, for Zeus's sake, employ editors who know something about science fiction - enough to be aware of this not-very-obscure sensitivity - if they are going to edit the work of science fiction scholars without first clearing page proofs.
(Of course, actually getting proofs is a bit of a luxury these days; even in book publication, it seems to be less and less to be taken for granted ... while editors of newspapers and magazines have always treated the author's text as something to chop around however they damn well like. What are proofs?)