(564 delegates is a direct quote from Doug Wead who is an advisor to Ron Paul in his campaign. The quote of 564 can be heard at the 3:02 min mark on the link below.)
The strategy the campaign is implementing is on track to collect a boatload of delegates.
This is a two man race between Romney and Paul. Santorum and Gingrich are not on the ballot for 500 delegates worth of states. They are not, and will not be on the ballot in other states besides just Virginia. They have no grassroots support and virtually "zero" ground game. They cannot win the nomination.
All this MSM Propaganda pushing either Santorum or Gingrich is a joke. Anyway you work the numbers, they are out.
We are in this for the long haul! Go RP2012!!!