Well that goes without saying. Of course it is.
(where's that tweed jacket/pipe-smoking/cocked-eyebrow/chin-stroking smiley when I need him?)
Thinking about everyone again, I am directly responsible for a good 20-30% of them owning/using an iPhone, going back several years. So I'm kinda proud of that.
I was the first, by far, of anyone in my circle to have one, way back in July 2007, weeks after they first hit the streets. I went well over a year being the only iPhone owner of anyone I knew. Then along about the time of the iPhone 3GS and definitely the iPhone 4, others started to come to me and ask about them, pick my brain, etc. By the time the iPhone 6/6s hit, the bulk of the above were on them (and are now on their second or even third model since ~2015. I knew quite a few people who jumped on the 5s too. Any stragglers/holdouts all came on board during the 7/8/x releases, and many of them are looking forward to the upcoming release (because it's been 3-4 years and they're ready).