They are probably waiting for the better drivers to be released in a week or so
Geekbench does not do tests of the graphics system at all, just for what it's worth. So it's not that they suppressed the test results or didn't run them; it's just not what GB does.
Keep in mind that Geekbench 2 only measures processor and memory performance which is why, for example, MacBook and MacBook Pro scores are so similar, despite both having radically different graphics adapters.
(see the top of the chart)