Why exactly is CB Talonflame only running 60 Speed? The main priority of the Choice Band set (to me anyways) is revenge killing, which places a much higher importance on Speed than bulk. I get why you'd only run 60 Speed on Bulk Up and I guess SD, but Choice Band really wants extra Speed. Jolly Excadrill is a pretty bad jump-point to me because all you do with CB Talonflame is spam Brave Bird anyways, and offensive Excadrill doesn't want to take a Brave Bird anyways:
252+ Atk Choice Band Talonflame Brave Bird vs. 4 HP / 0 Def Excadrill: 177-209 (48.8 - 57.7%)
Outspeeding Jolly Mega Kangaskhan is really important to me, especially because it's both on its preview and really common. With only 60 Speed, Talonflame has no hope in revenge killing it, which it can do fairly easily after some prior damage:
252+ Atk Choice Band Talonflame Brave Bird vs. 4 HP / 0 Def Mega Kangaskhan: 235-277 (66.7 - 78.6%)
To outrun Jolly Mega Kangaskhan, you need 164 Speed. It's also nice to be able to outrun Mega Pinsir so that it can't pick you off if you're in a tight situation where you need take Stealth Rock damage in order to revenge it. It's not as necessary because 1. Mega Pinsir isn't nearly as threatening as Mega Kangaskhan and 2. because Talonflame can live an unboosted Quick Attack after Stealth Rock (though it will die immediately afterwards to Brave Bird recoil):
252 Atk Aerilate Mega Pinsir Quick Attack vs. 48 HP / 0 Def Talonflame: 129-153 (41.7 - 49.5%)
This is a calc with 208 Speed, which is how much you need to outrun Jolly Mega Pinsir. Still, it's probably worth mentioning somewhere in the analysis/preview that 208 Speed outruns it because Talonflame is about as solid of a Mega Pinsir answer as you can get for an offensive team.
tl;dr—164 Speed>60 Speed on CB Talonflame for Jolly Mega Kanga, but a mention of 208 Speed for Mega Pinsir would be cool as well