Grouping DateTime field in FetchXML

Is it possible for FetchXML to return the full date when you group by  date time field.

For example, the following FetchXML should return the 11/1/09 on billingstarton rather than 1

<?xml version="1.0" encoding="utf-16"?><fetch xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" aggregate="true"><entity name="contract"><attribute name="billingstarton" alias="billingstarton" groupby="true" dategrouping="day" /><attribute name="title" alias="title" groupby="true" /><attribute name="netprice" alias="netprice" aggregate="sum" /><filter type="or"><condition attribute="billingstarton" operator="on" value="11/01/09" /></filter></entity></fetch>

Thanks

Leo