Comment Yeah ... (Score 2, Informative) 249
Historically, that is how we've judged the success of cloning, or genetically manipulated animals. A lot has to happen after fertilization -- blastulation, gastrulation, then further development, any one of those can be considered a success. Early cloning experiments with the common frog (Rana pippens) were considered successful because the made it to the gasturla stage, another frog species formed viable embryos, but not frogs, and was still a success. Dolly surviving well into adulthood was a fluke, and she still died early, of something that might have had a genetic cause. It really is all how you care to define success. If you thought we were a few years away from re-creating Jurassic Park, or someone promised you a harem of 50 Jessica Alba clones in a few years time, yeah, this is a very disappointing story for you.