The examples in the source were from the days when it was unusual for
routers to do the TTL decrementing for ICMP messages correctly.
Traceroute was the tool that caused folks to fix these bugs.

I can't recall a single case within the last few years where I did a
traceroute and saw a "hole" of 5 or more hops.

-wolfgang
-- 
Wolfgang Rupprecht    <wolfgang@wsrcc.com>     http://www.wsrcc.com/wolfgang/
Coming soon: GPS mapping tools for Open Systems. http://www.gnomad-mapping.com/