It was said in the Famitsu interview. There are two translations out there for that interview and they both rendered it approximately the same:
http://www.reddit.com/r/ffxiv/commen...ast_interview/
"With the new system, once you're at 60, you can then become an apprentise to each respective guilds' guildmaster. You'll gain new skills and recipes by becoming a meister/specialist."
http://www.bluegartr.com/threads/125...29-Translation
"After you finish training, you'll be able to choose a profession to qualify as a Specialist which may provide a special action or special recipes."
I'd like to think that was something misspoken and that recipes are not included. The Live Letter is really a much more formal channel than an interview, so I would place more weight on the Live Letter.
I don't expect it to be worth it to have Alts. I can basically guarantee you the Specialist abilities will NOT be cross class. The whole point is to get away from the current system where crafters who don't extensively cross class are useless. Those of us who have all the cross class skills and can craft top level stuff currently should still be able to continue to do so at a comparable difficulty in classes we are not specialized in.
Think Specialist system = boost for casual / single-class crafters.