hmmm...
i just checked their website again...and they write:
"The Admissions Committee considers applications in the order they are received, so it's in your best interest to apply as early as possible."
but i also know that they only send out acceptances twice...also on the website:
Around mid-January, the Admissions Committee begins to decide to whom the first offers of admission will be sent. Initial offers of admission are sent out around February 1. Another round of acceptances are sent out in mid-March.
maybe they consider in the order received, but the rolling admissions effect is null because they don't give out acceptance along the way.
?