We had previously theorized that the extras + info bug found in Lumia devices which had update 1 was caused by the fact that Lumia Denim and Update 1 would be the same for all devices and this seems to be case. In a recent FAQ post, Microsoft confirms that only select Lumias will get firmware updates with Lumia Denim.
From the FAQs
Lumia Denim is the marketing name for latest Lumia software update, which is a combination of firmware, OS (operating system) and Lumia exclusive applications. Exact contents coming with Lumia Denim vary depending on the device model, and some devices are not requiring new firmware for the new features to be enabled, so firmware can in some cases remain unchanged.
Translation: If your phone is not an 830, 930/Icon or 1520 and you’re already on the latest OS builds via the Preview for Developer app, there’s nothing to wait for.