I am convinced this is a hoax - and suggested it on Digg when the story first came out - for two reasons:
1) The "Quarterly Reports" sounded more like "evidence" and "proof" of said crafts rather than actual reports on the gains made in that period. Meaning, they used the "reports" to make the story work, citing history, technology, etc.
2) The photos show the craft near power poles or satellite dishes, which plays easily into the "disrupted invisibility" thing.
1) The "Quarterly Reports" sounded more like "evidence" and "proof" of said crafts rather than actual reports on the gains made in that period. Meaning, they used the "reports" to make the story work, citing history, technology, etc.
2) The photos show the craft near power poles or satellite dishes, which plays easily into the "disrupted invisibility" thing.
Q.E.D.!