How do I sync multiple g-calendars to the new Windows 8 Calendar?

I'm able to add multiple g-calendars from multiple accounts, but it appears that only the root calendar is synced with Windows 8's Metro Calendar app. Is there a way to sync all gmail calendars?

From a question I asked:

Someone posted a working solution on Microsoft Answers:

1. Download User Agent Switcher from the Chrome Webstore
2. Select an iOS device
3. Go to https://m.google.com/sync/settings/iconfig/welcome?source=mobileproducts
4. Deactivate Javascript in Settings (Show advanced settings, Privacy > Content settings > Do not allow any site to run JavaScript)
5. Click your Windows Mail device
6. In the URL change supportMultiCalendars=false to supportMultiCalendars=true
7. Submit URL (Press Enter)
8. Check the boxes for the calendars you'd like to sync
9. Save
10. Readd your Google Account to your Windows Calendar app. It now works.
11. (Re-enable JavaScript in Chrome)

At the moment, this probably can't be achieved. This same Question has been asked on MS Support and they have replied with a no.

Question

Syncing Multiple Google calendars with New UI Calendar app

Answer

Currently per Google's request for bandwith, Calendar App only Sync root calendar.

Developers on both sides are working on this issue to improve accessibility on this.

Another thread from the Ms Support

Question

How to sync multiple Gmail Calendars using the Mail, Calendar, Messaging and People App?

Answer

You have multiple calendars in your Gmail calendar but only one of them syncs with the Calendar app and you want to know how to sync all the others calendars to the Calendar app. Please note that currently per Google's request for bandwidth, Calendar App will only Sync root calendar. Developers on both sides are working on this issue to improve accessibility on this.