3500 Egyptian prefixes?

[Iljitsch van Beijnum <iljitsch () muada com>]

On the Renesys blog http://www.renesys.com/blog/2011/01/egypt-leaves-the-internet.shtml
it says that 3500 prefixes disappeared. 1% of the global table seems a lot, especially considering that according to 
AfriNIC Egypt only has 122 IPv4 and 7 IPv6 prefixes.

What gives?