UX isn't about who did what first. It's about doing what makes sense for the user, then reapplying it in every scenario that works. Pull to refresh on the iPhone was utter genius and everyone adopted it. No one is saying, "Well Tweetie did that first!"
Also, it seems like a "no brainer" now, but during the development it's easy for these no brainer things to either be ignored or written off as a waste of valuable engineering time.
Same here. When writing instructions about how to install the historious bookmarklet, I had to take screenshots of all the browsers, including the iPhone. I don't think of it as a nice touch, it's integral to people's understanding of how to install it.
I haven't had a single request for additional instructions, ever.
I see this as more of a no-brainer for a software download than a standout example of brilliant UX.