According to Net Applications, in June

Windows Vista accounted for 4.52% of all systems that browsed the Web, up from January's 0.18%. Vista has grown its usage share each month since its release to consumers Jan. 30, hitting 0.93% in February, 2.04% in March, 3.02% in April and 3.74% in May. Apple Inc.'s Mac OS X, meanwhile, accounted for 6.22% in January and hit its high point of 6.46% in May, but it slipped back to 6% in June.

Does it mean that Mac users are surfing less and less, yet Apple is selling more macs?