Not exactly true no. As I mention in my hub the number isn't the huge factor with search crawlers, it's consistency.
If you consistently make 100 backlinks a day, every day, for a month, the search crawler won't flag it as spam. However if you make 100 backlinks today, 5 tomorrow, 0 for a few days, a thousand next week, etc. The search crawler will notice the inconsistency and flag your site for link spam.