I would imagine a number of sales were existing owners upgrading.
Clearly some of the AA and Gundam sales link to slim purchases.
While no one older title took a big boost, many took small boosts, implying to me that rather than new owners flocking to a core title as would like happen with 360 (Halo or Gears) many new slim owners spread their first game choice over many titles - i.e. some went with Killzone, others inFamous, others MGS4, etc.
So, perhaps 30% or so was exiting PS3 owner IMHO with the other 70% spreading their sales across newest titles around like Batman or a wide variety of older titles.
The real test of SW will be whether the underlying weekly average takes a sustained increase - and I think we'll need to wait a few weeks to see that.
When the next wave of new releases hit should be informative as well, as really you'd expect to see a rise there.
I guess finally if HW drops way down then a large percentage was probably existing owners, if HW drops but shows a noticeable sustained boost then we know the slim is selling to new owners consistently - i.e. more than would have the case prior to slim release.
Try to be reasonable... its easier than you think...
