With all the late-night talk shows doing re-runs because of the WGA strike, movie marketers are losing out on the big promotional bumps that come from celebrities visiting Leno, Letterman, O’Brien, Ferguson and Ellen DeGeneres. No way you can’t call that a signficant hurt factor. But the Oprah Winfrey show isn’t affected by the strike (it’s technically regarded as a news show, like Larry King‘s) and so the attention she’ll be giving to The Great Debaters (Weinstein Co., 12.25), which she’s one of the producers of, will be unaffected also. I’ve been told that research screenings have been “through the roof.” One report said that the number of people checking the top two boxes (very good or excellent) were in the low 90s, and that the “definite recommend” factor was 84%.