pmm711: There is nothing worse than clicking on "Play Now" and the gameclient doesn't open. I always have open a new screen or new tab and enter wgt.com/gameclient.aspx in order to play.
Setting the home page to the game client means every time you open that browser you're going to the game. If you only have one browser you either have to open another tab or navigate away.
Having 2 browsers fixes that because you can set one to the game and then drag the icon for the browser into your quick launch toolbar. That way you use your regular browser like you normally do and when it's time to play you just click the icon in the toolbar.
FWIW, having WGT's main page open and the game at the same time typically causes problems. You're sharing the same data transmission line with the game and all the stuff that goes on on the main page gets in the way. The least one should do if they click that Play Now button is to immediately close the main page.