Im scouring the internet trying to find information on this and not coming up with anything.
Nothing on Wilson's site (checked US, UK, AU, JP).
Only thing on entire net about this racquet is from the seller I just bought from.
Weird. The seller is reputable and a major store so if they turn out to be 18x20 I will send them back otherwise I will be returning to this thread to post updates on them as soon as they arrive.
I did find this thread here at TT back from December of 2011: http://tt.tennis-warehouse.com/showthread.php?t=406883
Last post mentions Wilsons site having a page for this very racquet but poster never put a link to it.