Twitter is already buckling under the weight of the massive buzz around Apple’s tablet. Ahead of the expected 1pm announcement, some tweets are already taking 4 to 5 minutes to post, Mashable reports. That sort of undermines Twitter’s “real-time” news appeal, on a day that promises a lot of news; the State of the Union is tonight. It wouldn’t be the first time Steve Jobs crashed Twitter—he did it at Macworld two years ago, when Twitter was a much younger service. (More Twitter stories.)