Tim Hampson posted an interesting snippet on our own executive collaboration portal about his new iPad and travelling through SFO.
Obviously worth checking directly given the variability in experiences, but for many, this could be sufficient reason alone to leave the laptop at home and pack the iPad instead.
Apple pointed out that in fact this was being talked about almost immediately after the launch in April.
http://finance.yahoo.com/news/Apples-iPad-easier-on-airport-apf-2785893715.html?x=0&.v=4
However, the variability of experience suggest that not everyone at TSA got the memo, so I think it’s wise to always ask as you go through screening.