Customer testimony on places like Webhosting Talk have cast all of those numbers into serious doubt. OVH is more likely to nullroute your IPs than it is to fight off a 300gig attack.
Do you have a ref for that? I did quite a few searches and didn't find a single person on webhostingtalk saying they had been null-routed by OVH in the past year. Only one guy who worked for a competing hosting provider.