I dropped by the Apple Store today to look at the Retina MBP in person - it was sweet! I asked the Apple employee next to me about upgrading the RAM. He says it's easy to do and is NOT soldered to the motherboard like the MBA. I said "Are you sure?... I read online that it was soldered like the MBA." He says "That's what I thought too, but it is upgradeable." He said "you can even upgrade it yourself at a later time." Are all the Apple employees this naive? iFixit tore it down and said it's soldered to the motherboard. Why are the Apple employees claiming it's not?