I was wondering how accurate is the credit scores you get from the mail when being denied from an app. It showed my EX score and it seem to fit right with all my other scores. (The lowest out of three).. 
It actually depends. Sometimes it is your FICO, however some use an internal number that they generate. This sometimes is a formulation of your FICO and their proprietary system. Also there are autoenhanced scores and CC enhanced scores. Confused? Yeah, so am I!
July 2013 score: EQ FICO 819, TU08 778, EX "806 lender pull 07/26/2013
Goal Score: All Scores 760+, Newest goal 800+
Take the myFICO Fitness Challenge
Current scores after adding $81K in CLs and 2 new cars since July 2013
EQ:809 TU 777 EX 790 Now it's just garden time!
June 2017 update: All scores over 820, just pure gardening now.