^ 30% of the total target audience seems kind of high. samsung is a smart company and spends tons of money on advertising and market analysis. i'm thinking they must have results hinting of little impact to holding out the 32gb version since they offer the sd expansion. could also be related to price point and profit margin mix of manufacturing/selling the 32gb vs the 16gb.
that said, i am surprised 32gb isn't on the radar since almost all recent flagship phones on vzw were released with the 32gb option if it were available. perhaps they're holding out the 32gb version and higher to steal some of apple's thunder later down the road?
memory is cheap and ubiquitous so them not offering the 32gb or higher has to be a strategic decision and not an oversight...at least, that's what i would think...