For what it's worth and it may not be much the guy wzor is pointing to works for MS and HE says it's 240 and has posted screenies of it running on his MS pc.. Personally I will wait until MS announces it and hopefully that comes in about 3 hours from now during the first keynote. Several others have popped in and out of here since Friday also saying it is 240 and they haven't stayed around long enough to ask questions of so I probably do believe 240 will be it when it is confirmed.
The rumor comes from screenshots provided by the same person who leaked 10176 . No one has confirmed for sure however. I guess the info coming from someone who leaked 10176 might hold some credibility.