Bullshit bullshit bullshit. A shot of enanthate increases test levels within the first day. What you are talking about is the accumulative build up of test levels due to shot after shot. The point is, you should see some gains by the end of the first 10 days. You will notices more drastic gains at the third, fourth, and fifth weeks but it doesn't take that long to 'start'. As for libido, you should notice a difference within only a few days.
I don't understand where you guys are getting your info from. I don't see any science behind what has been said here nor do I recall any personal experience being even somewhat similar to what I am reading. All I am saying is to be careful who you take advice from.