Very true about accounts taking a long time to take off.
You're looking at a few weeks before you can realistically expect them to have 2000 followers, unless it's a very popular subject who think of you as an authority figure in that field.
A good idea is for new accounts, creating an RSS alert on Google News and then use TwitterFeed to grab the updates and add them your Twitter account tweets.
This will mean whilst your building up your followers, your Twitter account will publish news on that subject and then link to the source.. this could be a newspaper or website, it'll be updates and won't need a website/blog for the time being. I'm pretty sure a new Twitter account which hardly ever tweets, raises a flag.
Then, when the Twitter account has a decent amount of followers (say at least 700+) you could then create the blogs... it just means your Twitter accounts are building whilst you work your way through creating blogs, as Twitter accounts are quicker to set up than a nice professional looking blog.
One of the few downsides to Tweet Adder and that's if you're using public proxies, you need to set each account up every time you load the software up. If the proxies are dead or can't be accessed then TAdder will return an error you need to try again with that account.
This means at the start of the day, it could take 20 minutes to get 20 accounts up and running, before you leave it... but if all those public proxies die, Tweet Adder looks like it's following and unfollowing (as in the numbers go up and down), but the account actually isn't. Not sure what happens in this situation on Tweet Attacks - does it alert you that all proxies are dead?
That's why I'm using my main, most popular blog and T account on my home IP address.
I hope that makes sense