I don't think that just because people don't complain about it it has no effect.
re app size : Google has already published stats urging apps to optimize their size as much as possible since it has direct effects on acquisition.
I suspect that long download times lead to more errors + more wait time before you can use the app = more likely that the user will abandon its current task and
Same with slow app or ui patterns that don't fit with the platform = easier to lose users in the first crucial minutes.
re app size : Google has already published stats urging apps to optimize their size as much as possible since it has direct effects on acquisition.
I suspect that long download times lead to more errors + more wait time before you can use the app = more likely that the user will abandon its current task and
Same with slow app or ui patterns that don't fit with the platform = easier to lose users in the first crucial minutes.