I check which apps have Facebook permissions and remove them all the time so 13 didn't surprise me (I wanted those 13 to have permissions). Twitter was more of a surprise with 45 - 41 of which can 'act on my behalf.
Edit:
Please change the title of this post (at time of writing it is: "92 Facebook Apps Have Access To My Account"). The service checks permissions for around 10 different sites - not just Facebook.