Reduce/force DFS link cache refresh on clients

Hi, everybody.

From http://technet.microsoft.com/en-us/library/cc782417(WS.10).aspx I see the referral cache refresh rate is 15 minutes, but it also says the time to live for the link cache is 30 minutes.

Is it correct to assume clients with good connectivity to DCs will update DFS referral and link caches every 15 minutes?

From http://technet.microsoft.com/en-us/library/cc780950(WS.10).aspx I see there is a GPO setting Computer Configuration\Administrative Templates\Network\Sets how often a DFS Client discovers DC’s

But it also states The minimum value you can select is 15 minutes. If you specify a value of less than 15 minutes, the default value of 15 minutes is used.

Is there a way to trigger clients update the DFS link cache in less than 15 minutes?

Thanks,

Mario