'Evidence.' We have a variety of rumors that are hard to glean much reliable information from. I can't imagine Nintendo will settle for 512MB of RAM or a GPU comparable to the 360 when there is better tech out there that is both practical and cost effective. You don't need to be bleeding edge to outdo the 360.
--
"When I was a young man, I had liberty, but I did not see it. I had time, but I did not know it."