Definitely not deserving of a ban in my opinion. Saying "man that sucks, but I struggle to believe anecdotes from someone I don't know that are statistically implausible" is pretty mild.
If that gets a ban, then most posters on the site deserve a ban as well. I really hope we don't start policing posters to that extent.
To back up my claim, here is a much more (deservedly) aggressive post by me, expressing the same sentiment as the post cited for Nymphae's ban:
(The post I replied to)
If there's more to Nymphae's ban, I'm not aware. But, I would say that if banned for the post linked on the ban page, that it should be rescinded or lowered in duration.