• http://www.zettasphere.com/ Tim Watson

    Great article and thanks for publishing the stats.

    I couldn’t agree more about open rate being a terrible predictor and click rate better but not great.

    I looked at results from 50 million emails and the conclusions were very close to yours as to how often open rate and click rate get it right. See analysis here:

  • http://conversionscientist.com Brian Massey

    Tim, thanks for the link (and the education on the Pearson Product Moment Coefficient). Of note was, “The impact of the subject line goes beyond the open…” Yes indeed.