They’re something like 5% domestically, a little less if you include all budget devices, a little more if you only look at “premium” phones in its price category.

It’s likely made no impact on iphone sales, but I don’t think it’s a reasonable goal. Android and iPhone users don’t meaningfully switch, the goal would be to gain Android customers, and it seems, drive market direction. 5% of all US phones, which is 10% of android phones, doesn’t seem terrible considering they’re certainly spending a lot less than Samsung et al in R&D