Planet13 - 3:15 pm on Aug 17, 2013 (gmt 0)
It does prove that a one page site with an exact match domain, little content, and a relatively small number of linking domains can rank very well.
How old is the site?
When did it start ranking well for its keyword?
could it be still in the honeymoon period?
As far as I know, exact match domains (EMD) were not PUNISHED by google so much as any extra ranking boost for having the keywords in the domain name / DNS was eliminated.
So it was not so much a punishment but an effort to level the playing field, no?