I think they have already announced it will have an 8GB card. I imagine this has to do with production costs. The thunderbolt is basically en EVO with LTE on Verizon's network. This is almost a whole year after the EVO launch which means lowered production costs including R&D. I honestly wasn;t aware the Thunderbolt is shipping with a 32GB card, but if that is truly the case those are the reasons I would peg for it.