And they didn't tell anything about what apple did to make it fast. About this for instance

  Betty:~ lelf$ dig www.apple.com

  […]

  ;; ANSWER SECTION:
  www.apple.com.		1434	IN	CNAME	www.isg-apple.com.akadns.net.
  www.isg-apple.com.akadns.net. 21 IN	CNAME	www.apple.com.edgekey.net.
  www.apple.com.edgekey.net. 21234 IN	CNAME	e3191.c.akamaiedge.net.
  e3191.c.akamaiedge.net.	20	IN	A	23.32.109.15

  […]

(If you really don't understand: http://en.wikipedia.org/wiki/Akamai_Technologies http://en.wikipedia.org/wiki/Content_delivery_network)

EDIT: formatting, links