Change the default timeout in WWW calls ..?

I've always wondered ..

 var w:WWW = new WWW( fullURL, postData, jsonHeaders );
 yield w;

when you yield to an ordinary old WWW, if the server is really slow there is a timeout time out of I believe about 90 seconds, and then it returns with an error.

(90 seconds was great in prehistory, before 2005 say, but maybe 10 seconds would be more normal today eh!)

Is there a way to adjust this setting, or a work around, or ?

Cheers ...