With all due respect, the referenced pdf is nothing but a glossy write up of standard terms that you even hear about on TV nowadays, not much more. I assume its targeting totally uninformed clients (Japanese buy side funds? ;-) who in 2012/2013 still have not caught on with algorithmic execution.
"Pinging" is so outdated that I would claim the information content you derive from shooting small orders into the market in expectation of learning about larger orders looming is gonna be close to zero. We have reached a stage where predatory algorithms have become pray to even more intelligent bits and bytes. The biggest edge I see a hft algo can currently gain over others is paying cash in exchange for "special new" order types. Its another way of letting big spenders gain an advantage over others who are not willing to pay up. Its the same regulators-chase-hft-firms/exchanges-to-fill-loopholes game that has been played for close to 10 years now.