Just keep reporting the posts and explain in details while reporting it. All his spam posts would be deleted and he may likely get temporary ban.
I will, but I just wanted to bring this into everyone's notice, or maybe find a quicker solution to the problem.
A little bit beyond this case, you can see a user makes a series of post but if these posts are good in quality, it's not a spammer and no issue at all. Assume he composes these posts and when are ready, he releases it in a series. This style is not common but I would like to give the example to show that quality is key of deciding a post is spam or not spam, should be deleted or kept and a poster should be banned or not.
As for forum rules, there's no rules for "burst-posting", unless the posts are considered and reported as spam. But if the posts are somewhat good, then there's no issue at all.
That's part of the problem, I wouldn't be concerned or have any problems if he was making quality posts, I enjoy reading posts that don't waste my time, but that isn't the case here. All, or most, of his posts are generic low-quality posts which makes is clear how he is able to write a post every two minutes.