360 being 5.8m ahead of PS3 might not jive with the shipment numbers. As of Sep 30 360 was 6.5 m ahead. We know MS shipped 5.2 the Dec end quarter. If Sony as expected ships ~7 when their numbers come out, the 360's cumulative shipped lead will be 4.7m.
It's hard to justify a 5.8 sell through lead with a 4.7 shipped lead imo. In fact, if anything conventional wisdom might be that PS3 has less in the channel than 360, given there seemed to be some 120GB SKU shortages in the states recently.
Of course, guesstimating channel stock is dangerous, for all we honestly know 360 stock might be much more depleted worldwide than PS3.
If all this comes to pass, then there will have to be some light PS3 shipments in the next couple quarters to alleviate a backlog to somewhat vindicate Chartz sell through numbers.
All that assumes Sony ends up shipping 7m PS3's. If they end up shipping closer to 6m when the numbers come out, it's not a problem.