My guess is that he'd be able to say that with a straight face if the speed of the SSD in his 2010 Air makes the effects of page swapping not noticeable.I don't know how you can say something like that with a straight face . Frankly 2GB hasn't been used for anything much since 2005 and the minimum memory requirements of Mavericks will undoubtedly be 4gb.
My daily driver at work is a mini with 8GB of RAM + a Fusion drive, and it regularly pages in/out when I have multiple VMs open. I don't notice when the paging is happening - no beach balls, the Mac doesn't feel slower, etc.