I see. The small number I gave was from an article I had read awhile back - there's only one 70mm IMAX projector left in LA - and I couldn't remember the specifics of it and got my facts mixed up.
Though I'm still a little skeptical of that list. It says the IMAX I go to (Providence) has 1570 and Digital (and it also says that the theater opened in 2012 which is most certainly untrue). Like I said the last film projection I saw there was TDKR. But I guess the movies I've seen there since (Raiders, STID, Elysium, Godzilla) all would have been digital anyway? I don't know.