Just did the carrier update. Thought I'd share. Hope this fixes the wifi / data usage issue.
http://www.slashgear.com/verizon-iphone-5-carrier-update-fixes-wifi-and-3g-issue-01249811/
http://www.slashgear.com/verizon-iphone-5-carrier-update-fixes-wifi-and-3g-issue-01249811/