This info isn't all that surprising. No solid details on either CPU or GPU, and the 1.5GB with 512MB currently reserved for OS is what I'd expected.
I wouldn't be too concerned by the phrase "enhanced Broadway" to be honest. For one thing, the console's getting Assassin's Creed 3 on day 1, which is a game that's fairly demanding on the CPU, so it's at least on-par with the XBox360's CPU in real-world terms. Secondly, Nintendo don't actually give detailed schematics and low-level info on the architecture of the CPU. They'll give the instruction set, and the main pertinent features (number of cores, cache size, etc.). Because the processor is (almost certainly) binary compatible with the Wii's Broadway CPU, the instruction set is a superset of the instruction set of Broadway, and the features are a superset of the features of Broadway. This means that anyone looking at the details will see all of Broadway's idiosyncratic instructions and features, along with a bunch of new ones, and would easily conclude that the cores are "enhanced Broadways".
This would miss out on a lot of the "under the hood" changes that the new CPU may have, such as a new instruction pipeline, more aggressive out-of-order execution, lower cache latency, etc., etc., which wouldn't necessarily be known to developers pre-launch. The CPU could be an almost completely different architecture while still retaining a feature-set that would make it look like it's an "enhanced Broadway".
