Well I did a bit of digging at the sudden difference we are seeing. A
lot of this points to different levels of aggregation at different
points in the Internet. I took a dump from Bill's box at ?LA? and from the
xara.net router I use at Mae-east and saw one immediate example of
this. Here's the prefixes announced out of the 206.16/16 (belongs to
CERFNET) block.
First from xara.net (12 prefixes)