AnandTech has published a review of the Intel X48-based DFI X48 LT T2R motherboard:
Overall, we still have to concede that a particular user will lean towards this kind of motherboard. If you subscribe to the belief that all boards are the same, or if fine tweaking options do nothing to float your boat, there's a whole host of sub-$200 motherboards based on Intel's P35 chipset that fill the role of a good overclocking board perfectly. Boards priced above $200 must fight fiercely not only to provide masses of BIOS options and functionality, but also justification for their price tag against a competitively priced product. Ultimately, the boards are often so closely matched that winners emerge based upon the ease at which a user can attain high FSB speeds that can be run in a stable manner. The question is: can DFI topple ASUS's X38/X48 DDR2-based boards such as the Maximus Formula and superlative Rampage Formula?
Check it out over here. The reviewer says the X48 LT T2R is a nice contender but is a bit disappointed about the performance.