They are really close, some could be preggo. One of mine was and dropped 2-3 days after I noticed and another colony that is the same weight has started to do the deed.

As you have read asf's takes a little bit to get going but once you start to build colonies pretty soon you will be knee deep! I had two 1.3 and I held back 4 females from one and 1 male from the other that I made a colony (1.4) from them and just kept branching off and now I have way too many