So you are saying none of those ADV titles mentioned are as popular or well received as Wolf Rain & Cowboy Bebop? So neither Neon Genesis Evangelion/Azumanga Daioh is not as popular or well respected then than either of them titles
With people having a Love/Hate relationship with Wolf Rain. You could easily argue that quite a few ADV title are better received overall than Wolf Rain.
You also have to think back at the cost of buying series back then. You couldn't taken as much a gamble on buying a title simple because of the costs involved. Today for £15 you can get 13 episode box sets, back then for £15 you got between 3-5 Episodes. Were people back then really that stupid to spend up to £90-105 on poor series, really?
ADV shows were not exactly getting poor scores either at the time. A lot of title I mentioned were getting score marks of between 8-10 out of 10, which aren't too shabby.
Is the generally internet reception always that a good indicator of how well a series will do? The two of best selling titles now are also the shows which receive the most criticism, Naruto & Bleach.
The thoughts posted online about Anime only reflect a small faction of the views of the whole Anime community. The only true factor in popularity is how well a titles sell. Whether you love/hate ADV titles they must have appealed very well to a section of fans to keep ADV running for 10 years.
They still even appeal to fans of today. Both Manga UK (Guyver TV) and Funimation have re-license quite of the few title which have been released in the past by ADV UK.