As for why it's only being released now, I can speculate that they found the exploit on 9.0 - 9.2 (hence the posts on their website prompting people to download that specific version) and are working backwards through firmware versions with the exploit. I would imagine that competition actually has little to do with this.
I respectfully disagree.
Why spend so many resources implementing a new injection technique when you have one customers are happy with?

....from the gateway site
