A new poll and thread just went up at Search Engine Watch forums asking How fast is too fast to gain links???
Natural link building, which really implies not doing anything proactively with the intent of building links, that any link obtained is too many. What I mean is that if you specifically write an article with the intent that it will bring in links to your site, then that intent is wrong according to the search engines. What search engines want is that people should read that article, use that tool, buy that product because it is useful. If that happens to attract people to link to it because of the reasons listed in the sentence before this one, then that is natural.
If I invent a super natural product and it hits the market today, you better believe that I will get hundreds if not thousands of links in one day. Is that too many? Not if its natural. When it is natural? See where my logic is going?
The thread can be fun, because it has a poll. There are dozens, probably hundreds of threads on this topic over the years. Here is a new one with a poll.