I was browsing the FIRST Store and it seems that many areas (FRC/FTC) are completely empty and most of the remaining stock is low. Is this normal this time of year?
Its normal for FRC. As they begin updating their site for the 2015 season they remove all the old stuff from the site.
Stock is low because they (normally) create new designs for products every year so they are selling out of 2014 stuff and making room for 2015.
See the new FRC blog. This accounts for the CIM motors and possibly some of the other KoP supplies.