I don't think that's a problem here. I've been looking at the donors list and the sizes of donations for the past few months with an eye to where the public support test ends up, and by my arithmetic they could have given the $250k earlier in the year without ever putting the Foundation at risk of failing the public support test.
For what it's worth: Over the 2008-2012 window, the 2%-of-total-support cap on the amount of each donor's contribution which counts as "public" is currently at almost $40k; and there are five donors (Anonymous, NetApp, Hudson River Trading, iXsystems, and Google) which are currently above that limit. As a result, each new dollar donated by someone not on that list else counts as $1.10 towards the "public support" amount, since it increases by 5 x $0.02 the amount of "public support" from those five largest donors, in addition to the $1 itself counting as public support.
For what it's worth: Over the 2008-2012 window, the 2%-of-total-support cap on the amount of each donor's contribution which counts as "public" is currently at almost $40k; and there are five donors (Anonymous, NetApp, Hudson River Trading, iXsystems, and Google) which are currently above that limit. As a result, each new dollar donated by someone not on that list else counts as $1.10 towards the "public support" amount, since it increases by 5 x $0.02 the amount of "public support" from those five largest donors, in addition to the $1 itself counting as public support.