還要等多長時間才能拿到EAD？

上周二，打電話要求加速EAD。今天剛收到USCIS發的e-mail. 內容如下。 好象是EAD加速辦理被批準了（等了也近三個月了）。請問還需要再等多少天能才收到EAD？急死我了。
The status of this service request is:

Documentation submitted meets the requirements for expedite processing of your application/petition. The average time for a decision or correspondence is within two to three weeks, although the process is often faster.