Thanks for the congrats. :3 I'm saving my Mega Speed Up for later. I'm tempted to use it on Banette (to make it more viable especially on weekend Meowth) or Mawile (because I really, really like Mawile's Mega ability and... I really, really like Mawile), but so far I haven't felt the need to use it for the Escalation stages. Banette Mega evolves in 5-6 turns, and then the remainder of Giratina's health snowballs.
Fluke: The Mega Speed Ups are those Rare Candy icons. You'll see them in the team-building screen in the top right. If you drag one over a Pokemon whose Mega form has been unlocked, it will permanently reduce the amount of matches required to Mega Evolve that Pokemon. Be wary, as there's no confirmation check when you do this, so the item will get used instantly. People at gamefaqs speculate (but will probably confirm before the week is done) that each Speed Up use reduces the required matches of a Pokemon by one. The amount of Speed Ups that can be used on a Mega seem to differ between Megas. For instance, Gengar can only use 1, Lucario can use 4, and so on.
Edit: As of level 20, disruption rate remains the same as after level 10. Awaiting level 21.
2nd Edit: There are people who've cleared past 50 and there is even someone who has gone past 100. After level 100, you get another Mega Speedup, so there are at least 3 that are potentially available right now. The question people are asking now, is whether the Escalation stage will give speedups every 50 levels or if the amount doubles each time.