Interesting. I have recently started brewing extracts and just finished up my fourth batch. All have been great! So if the above is true, I simply have to decide if the extra $13 I spend on an extract kits is worth saving an additional three hours of my time. My initial thought is, absolutely it is. I may try BIAB at some point, but I don't know enough now to want to try and make my own recipe or need the control of the process that AG provides.
I've learned to do an all grain batch in about the same amount of time as an extract batch used to take me. If you can do that, then the extra $13 for an extract batch would be excessive.