"Normal-looking offspring were obtained from all four strains tested."
Link from article http://www.biolreprod.org/content/early/2013/06/25/biolreprod.113.110098.abstract)
One scary a$$ line, indicates a 100% success rate.
You should re-read the abstract to see what it is really saying.
The end result is that they were able to get normal-looking offspring from all four strains tested. However, there was an excessive number of failures in the process in order to get that process. The important line over-looked indicating what it took to get those end results: "cloned offspring were born at a 2.8% birth rate". If you check table 1 of the full article it shows there were a total of 651 embryos cultured in order to get their end results.
This is very far from a 100% success rate.
We have a different view of what constitutes 100%. Yes they started with randomly selected leukocyte nuclei but through the sorting and discarding
those known to give poor results, they ended with four strains which normal-looking offspring were obtained from all four strains tested.
I didn't count the ones discarded, as it's part of the cleansing process.