No question. Even before this Biggest Year, I had a sequence of slides about "The Changing Game" included in my Big Year program. The first one features the Pettingill Guides, then the Lane Guides, ABA birdfinding guides, etc. until we reach the Internet. Listserves and eBird are huge factors, of course. On a local level, cell phones.
My favorite story about the changing game: in 2007 I finished conducting a rehearsal, checked my email, called my wife to tell her there was a White-winged Dove at Montrose (20 minutes away) that a guy had in his scope. State bird for me at the time. Drove down, walked up and looked through the scope, as the bird hadn't moved an inch. A fairly common occurance now, of course, but that was the first time it had happened like that for me, and it was because the birder posted to the Illinois listserve from his cellphone. Game-changer.
Joe