2.1.1 keyboard - clarification

Hi,

I'm currently assessing a menu against guideline 2.1: http://www.w3.org/TR/2008/REC-WCAG20-20081211/#keyboard-operation-keyboard-operable


An example of the menu would be something like this:

http://lh3.ggpht.com/_tP2V1zz52Ws/TNq5duB6JGI/AAAAAAAABU8/tY2MpKHhlB0/ea.jpg

Now to meet the success criteria the sufficient technique G202: Ensuring keyboard control for all functionality<http://www.w3.org/TR/2010/NOTE-WCAG20-TECHS-20101014/G202>

Would you expect to tab through all links within each section? i.e tab to the top level link 'games' then tab through all the sub links of that category before going to the next top level link 'store'

Or is tabbing through all the top level sections acceptable? I think the former but wanted another opinion.