Not to be rude, but you are literally talking to someone who was in charge of this, looked at the graphs daily, and made the call when we went over the OTA limit on iOS. When I say multiple-apks are a large reason for the discrepancy, you should give me the benefit of the doubt. It's not the only reason mind you.
Christan Legnitto, working at FB on release engineering, see his submission of this article in 2013.
Your original claim was that OP needed to substantiate their credentials; it was done (regardless of who).
HN Guidelines suggest we reply to the strongest argument being made and to give the benefit of the doubt, and that doesn't seem to be your approach.
Edit: I can't believe I'm defending FB or anyone that caused their increase in usage.
Its purposely designed that way to encourage conversation. Its not like at work where you may fear challenging someone at a higher level than you.
As far as I was aware, the comment you were responding to was broadly accurate, but now I don’t know and have no additional information.
Ouch. Hope this isn’t how you managed your teams.
Also note that both platforms do delta updates but generally show the total size in the UI. So every update you aren't actually downloading that much over the wire.
Source: I used to manage the Android and iOS release engineering teams at Facebook