I was the first in my hall to start rocking an iPad for everything. I'd get some dirty looks from people who believe that it has to be on paper for it to be considered holy or something ahahah.Eventually more started. I'd say there's maybe 10 or so in my cong. that use them. Honestly it is pretty conveinent especially with the WT Library online now.
I once used my iPad for a public talk and caught a ton of flak from the PO in the congregation I visited.