You can copy tables using Copy Rows and feature classes using Copy Features, but curiously, it seems as though Copy Rows does not respect raw path notation.
>>> arcpy.CopyRows_management("myfeatureclass",r'in_memory\table')
Runtime error Traceback (most recent call last): File "<string>", line 1, in <module> File "C:\Program Files (x86)\ArcGIS\Desktop10.2\arcpy\arcpy\management.py", line 14392, in CopyRows raise e ExecuteError: ERROR 000210: Cannot create output in_memory\table Failed to execute (CopyRows).
>>> arcpy.CopyRows_management("myfeatureclass",r'in_memory\mytable')
<Result 'in_memory\\mytable'>
edit: on further inspection, it's not a problem reading raw notation, it is a problem creating a table named "table".