A point, I think, has been reached. Quite where this point sites and what exactly it signifies is perhaps not quite the issue. But it is a point that has been reached nonetheless. That point is, as Adam Tinworth says is moving "from something that is used by the social media cognoscenti amongst journalists, to something that is rapidly spreading amongst the more web aware hack."
Although Twitter's use as a breaking news source isn't exactly a new thing , with a growing number of users and an increasing number of both journalists and users all over the globe, it's now reached the point where it's the first place people are looking when something breaks.
And it's also now become the norm that newspapers are reporting about the immediacy of breaking news on Twitter, as opposed to treating it as an interesting sideshow. Witness the Telegraph's very good write up of yesterday's New York plane crash.
That crash, along with the Mumbai attacks, seems to have convinced sceptical journalists to at least give the service a go. And once journalists try out something new, they'll write about it, even if only a limited number of people are using it. That'll then bump up the number of people who give it a go .
In the past few days, I've seen a serious rise in the number of people I personally know joining Twitter, while the number of people following me has also risen dramatically (I think they've nearly doubled already this month), as has our corporate accounts at work.
Having a slew of famous names join as well has also given it credibility. Never mind the sneering articles written about these (although, and I may be along in this, I thought Bryony Gordon's piece was quite funny), the fact you have such a diverse range of celebs on there shows there's an appeal across a range of personalities.
Stephen Fry, Robert Llewellyn, Will Carling, and Andy Murray have all helped. And then there's Jonathan Ross, courting controversy with a few comments, but also quickly becoming the Twitterer's favourite celebrity.
Ross, will his huge contacts book, has been verifying celebrities as they join Twitter (or don't), and last night posted photos of him introducing the service to Danny Wallace and Eddie Izzard.
Phillip Schofield, who I think is the first ITV celeb to join, got Tweeting on Monday and has lept straight in, and is already being inundated with plenty of Twitter love. He's already proving to be a great role model on how to use the service .
So, Twitter is finally moving into the mainstream now that it's moved beyond a curiosity and into a genuinely useful communication tool (not that it wasn't already). Quite where it goes from here, and how it goes, I have no idea. But it's going to be fascinating to see how the site develops in the next few months.
And it also means I can probably stop banging on about how and why journalists should use it, because they're now doing just that. Which will probably come as a relief to everybody.
 See also: The Wire. Until a few months ago, the only people I knew who'd actually watched this were Guardian journalists and people who knew Guardian journalists. That sentence hasn't even been written for comic effect.
 And, about half an hour ago, gave me advice on the best organic veg box company to use in London.