XDataClient and $count

Is it possible to retrieve just the $count of a entity set with XDataClient like shown in http://www.tmssoftware.biz/business/xdata/doc/web/counting_entities.html ?

This could be useful for showing the count of detail records in a master dataset without loading the complete list of detail records. 

It will be, we have already implemented that feature in our internal development source code and it will be included in the next release.