I agree with what you're saying.
A quick read through the Eagle Graphite website indicates that they took over the property from Crystal Graphite Corp. in 2006. Since then they have been producing and have only explored around the quarry area (20 km. north of the mill). Now they are starting the process to expand the mill facilities and I believe it's just recently that they've discovered there could be a lot of graphite to be found in this area.
Rainbow has a nice location very close to the mill (being expanded) and where more graphite has been discovered.