And while the 1/20th figure is clearly pulled out of thin air, I think it's very safe to assume that "Janeway fans" are a fraction of "Voyager fans" -- after all, there are plenty of Trek fans who liked Spock more than Kirk, Data more than Picard, Kira more than Sisko, Porthos more than Archer. How large a fraction? I don't think anyone can say... but between her, The Doctor, Seven, and Tuvok, I feel safe in supposing none of them have a majority of fans.
I'm just curious why do you feel it's safe to say that?
Possibly because it has a grain of truth to it.
Although not a massive fan of Voyager when it was first broadcast over here but over the last year or so I've watched all of modern Trek and I've become to appreciate it more. BUT. Janeway is not my favourite character, hell, she's not even in the top five (The Doc, B'Elanna, Tom, Seven and Tuvok) although not my least favourite charachter, and the few people I know who also like Voyager don't think she's the best thing on there.
So why is William feeling "safe" to say what he did, because regardless of one's personal opinion on the matter, only a small number of people would say she is the best thing since sliced bread on that crew.