Snail mail

http://www.reuters.com/article/worldNews/idUSL2490042820080124
A Polish IT worker says that the speed of Polish post is slower than a snail. His priority mail took 2 weeks to deliver it for 11.1 km distance. He determined the velocities of the letter and a garden snail and reached the conclusion.
A few years ago, I saw a commercial with a Pentium on a snail. It was a metaphor that the Intel processor is as slow as a snail. Now, Mac OS is running on Intel processor. Possibly, certain snails would be faster than I guess.
If my research is slow as a snail, I would find such kind of snail.