Poppy's W Mechanics & Who it effects

Can riot or anyone confirm exactly what "mechanics" will be considered dash? Or more specifically, who's dashes will be stoppable with Poppy's new W?

League Wiki: http://leagueoflegends.wikia.com/wiki/Dash

League wiki breaks dash down into four categories: Auto-Targeted Dashes, Direction-Targeted Dashes, Ground-Targeted Dashes, and Unit-Targeted Dashes. Going further and saying that "All abilities that involve changing the location of the user via direct transit are classified as dashes, even ones that visually appear to be 'jumps', or utilize movement through the air - the game engine does not take into account the height of a unit so jumping units are considered to be on the ground for the purposes of skill shots and the like."

"Dashes should not be confused with knockbacks and pulls, which are usually sourced from enemy units (and are classified as crowd control"

Is the wiki list of champ dashes correct and is this a proper way to understand the dash mechanics? At first glance it seemed that Poppy's W was a very specific counter skill to a small pool of champs (Fiora, Riven, Renekton, Ahri, Lucian etc...), but if this list is correct, its a really big mechanic that stops nearly half the champs in the game. It's great to have a champ with this type of mechanic and gives teams a specific reason to choose poppy where they would have otherwise ignored her.

Just want to make sure I understand the mechanics and effect on the ecosystem a bit more.

Thanks for any and all replies! <3