FSU isn't a middle sister in any analysis... And you have it on authority that FSU hasn't had intermediary dialog with the B1G? You must have great sources.
No they are not, but especially now that the arms race is entirely on. SEC might have cold shouldered them back in the day, but there's no way they aren't bidding on prime real estate in their own backyard, FSU and Clemson, now. The Big10 has been open to Va and NC for awhile and that hasn't changed, but FSU could very easily be on the map for them now too. It could simply come down to the SEC outbidding the 12 for FSU and Clemson as a matter of self defense, triggering Va and NC to the 10.
One way or another, the current ACC is all but dead. Whether it's a matter of contract law, civil liability, or political pressure (Florida gov't gets along with ESPN's parent company right?) there aren't enough lawyers, bubble gum and duct tape to keep in together even 2 more years, nevermind 12.
I'm very interested to see where the arms race ends. It takes 10 teams to get the SEC, 10, and 12 to 20 teams per conference. Does it stop there or do some or all go to 22 teams? That could be an extremely important difference to UCONN in the near future.