I’m still holding to the tomorrow camp. But, just to rain on everyone’s parade here, for those who cited last year’s third developer beta release on July 5th and the year before on July 6th, as evidence that we should expect DP3 today, remember this: in both of those years, WWDC and, hence, Developer Preview 1, was a week earlier than WWDC was this year. So an argument could be made that we might not see an update until next week.
Personally, I don’t think that’s going to happen, as Apple still needs to get iOS 18 onto iPhones that have to ship and be on sale well before the end of September and so still has the same endpoint as in the previous years. So I think a release this week is more likely. But it might be Wednesday or Thursday, too.