Ipad doesn't support RAW, last I checked. Maybe on the ipad 3
iPad has supported RAW since iPad 1. If you load RAWs, they will be viewable, as it will take the jpeg preview to show you. Technically not raw, but it will be visible on the screen.
(Note: I have only ever used Canon RAWs, maybe Nikons don't work, but I doubt that)
If RAW transfer is too slow, more than 2 or 3 seconds for him is too slow, is it possible to shoot RAW + SJPG and send just the JPG to the Mac Pro or iPAD for viewing? Keeping the RAW on the card.
Can you shoot without a wireless internet connection available?
Yes, you can shoot RAW + sjpeg and send the jpeg to an iPad OR mac. The last time I tried an eye-fi, it would only allow me to set up one destination for the images, which made it mediocre for my use.
Eye-fi cards also support ad-hoc connections, so they can now connect directly with an iPad-- Previously this was accomplished through being jailbroken and using a wifi tethering app to create a network, but now it's no longer needed.