I use TA with lots of accounts following/unfollowing. From what I can tell, the older accounts (over 3 months) don't get suspended......even ones that I just started using. The newer accounts recently started getting suspended very easily. On the newer accounts, I can only follow 50-60 day without triggering suspensions. On the older accounts, I am doing 200-300/day with no problems, and I am planning to increase to a higher amount per day.
On the bright side, I have been 100% on getting my accounts reinstated. It normally takes 3-5 days to get your account back. After you submit your support ticket through twitter, make sure you reply to the email that they send you right away. Just explain that you have read the rules and their best practices and you think you were suspended because you were following too many people, too quickly. Tell them you won't do it again if they can reinstate your account. This has probably worked on roughly 20 good accounts so far.