People visiting magic sites are so small compared to mainstream sites like yahoo and google the numbers are just too out of whack.
For example, I have intimate knowledge of the real traffic on 8 magic sites - ElmwoodMagic.com is on your list above. TheTrickery.com actually gets almost twice the number of vistors that Elmwood gets each month, and yet the 1 week ranking average for TheTrickery shows on alexa as 746,324 and elmwood is at 150,791. Even the 3 month is 282,408 vs 250,029. And today is 56,334 for heaven's sake!
Of course if all the magicians who were online had Alexa these numbers would be more accurate - given that that is not the case, and is unlikely to be the case - all these numbers do is give a false impression.
Of the sites that I have actual data for the list goes like this:
It is even hard to compare sites from different providers as everyone has their own ways of calcuating visitors.
I used to really think Alexa was cool until I realised how easy it was to mess with the numbers - even without knowing it.
So I never use it anymore.
The Top 100 on my site uses real data from people voting once - but of course it is biased because the people are on my site so naturually often vote for the sites I've produced. The Top 100 on AllMagic is basically people who advertise with Richard. The lists all have their biases.
The best thing to do is find a site you like and then find other sites from the same company or dealer, or magician, or links they recommend.
I, naturally, think Digital Cheetah produce some of the best magic websites on the web. The single most successful sales vehicle is AllMagic.com - this drives way more sales for all of my clients than anything else. Not always as much traffic, but always more sales. The MagicCafe generates a ton of traffic, but for my clients at least very few sales. Howie at the Trickery has some Blaine Sites that generate him more traffic than all other sites put together. ElmwoodMagic is getting a lot of traffic from a porn site in Taiwan ...
I guess it just depends what you are looking for!
Of course the other problem with all of this is the criteria for "Top Magic Site". I think the best place to buy magic ebooks is lybrary.com by far, but I think your actual site leaves something to be desired from a design and usability perspective. I think martinsmagic.com is one of the best sites to view photos of new and old magic tricks and read reviews but you can't buy any tricks from there so how annoying is that!
The biggest reason I put the Top100 on my site ( http://www.martinsmagic.com/?html=top100
) was so that I could see any cool new sites that came along. And when I found them I'd post them too - so at least I had one place to store all the good sites. Of course, because anyone can post on there, not all the sites on the list are to my taste - I try to weed out the really bad ones every now and then.
Well before I get into trouble, that is enough of my rantings!