OK... In other words the N800 should have up to 4x faster file data transfer rate with SD than N770 with MMC cards? (MMC cards had only 1-bit interface?). This is good news since the speed, especially write speed, to the MMC card on N770 was ridiculously slow... I bought external USB reader/writer and it seem to be like 3-5x faster when writing data to MMC.

Has anyone tested how long it takes to save a big file into the N800 SD card to calculate actual write speed?