I just went through the pre-approval process and my Equifax score was the same as the one pulled by the lender and my Transunion was 6 points higher on the lender pull. My Experian fako score was 30 points lower on the lender pull. Experian is pretty useless.
Starting Score: 532
+1, yeah Experian sucks! The scores my lender pulled were 718, 703, and 639. And guess who was the lowest...Experian.
Cards: Orchard Bank ($1100) | Cap1 Cash Rewards ($2500) | Chase Freedom ($1000) | Best Buy ($2500) | Discover It ($1000) | Barclay Rewards ($2500) | Current scores: EX FAKO: 684, CK TU: 649, FICO EQ: 680, FICO TU: 698, FICO EX: 658 Happy Homeowner Since 2/6/13! 
Last App: 4/5/13 Gardening until July 2014
Same week pulls- TU MyFico 594- TU04 (lender) 619- TU08 Walmart 634. I apped for Walmart card on 11/18- and got the 634. Next day the lender pull was at 619, so I pulled on here and got a 594. From what I can tell, old baddies have a lesser impact on newer models, and high util has a greater effect. Best of luck.
Starting Score: EQ 416 TU 498 EX 468 Lender Fico's July 2012