Here's a good amount of hard data on a variety of curves, well-analysed and the findings summarised in a readable way:

[http://safecurves.cr.yp.to/][1]

The chosen answer is not nearly up to the same standard of analysis and, I would argue, deceptive, whether maliciously or just due to lack of understanding of basic research methodology.


  [1]: http://safecurves.cr.yp.to/