Do a search as follows: your keyword - anything.com (just like that, just substitute your keyword). See what your SERP is compared to what is shown on a normal search. In my case it is something like it was prior to Penguin.
I got this from another forum, though the poster can't remember where they saw it or why it was said that this result was produced. Does anyone have any ideas please? I'm sure there must be a simple explanation.