Actually I believe it was developed to be impervious to nuclear attack – a decentralised system where any cause of obstruction would be skirted around.
A bottleneck like, hmm.. an ISP filter is an obstruction to be skirted around. Nothing more.
Hi D. The quote (as I provided the other day) to go with what you are referring to is:
"The Net interprets censorship as damage and routes around it." – John Gilmore.
http://en.wikiquote.org/wiki/John_Gilmore
regarDS