No, it's not an example of that because I wasn't using the notification center example to draw parallels to Samsung. I was merely asking you: do you think Apple copied Google based on your logic?
Here is another example of the tu quoque:
"Republican candidate Chester Molester is immoral because he cheated on his wife!"
"But, democrats cheat on their wives too!!"
Do you see the tu quoque there, even though the second guy didn't specifically reference Republican candidate Chester Molester?
Unless you had something completely different in mind with your gotcha question -- but in that case, I suspect your line of reasoning is a non sequitur.