First, I'm not aware of a bypass for this behaviour I'm afraid Image may be NSFW.
Clik here to view.
Unless you make the AD queries directly. The Quest AD snapin could help here.
Secondly, and in the defense of PowerCLI, this is imho a problem with the RetrieveUserGroups method, which the PowerCLI cmdlet uses under the covers. That method apparently doesn't optimise the LDAP calls to AD.
