A WebmasterWorld thread reports that those who are displaying Google referral code (within the AdSense account) for the Google Pack product are in fact not showing Google Pack buttons and material. They report that it is showing Firefox icons, graphics and materials instead. Seems like a database slip up to me.
To test if this is still happening, I have embedded the code just below this line. It should show Google Pack material and it also should show a text ad for Google Pack right here.
Update: After posting the Google Pack creative, it is displaying Firefox creatives. So I decided to take a screen capture and time stamp it for evidence. Hopefully the above ad will change soon, to the Google Pack.
Forum discussion at WebmasterWorld.
