I remember there being a topic, but I cant find it now either.
From memory, it was along the lines of a player saying they thought it regrettable that Viking armies appeared so rarely in tournaments, and they felt that it was because the Vikings didn't have the ability to field mixed TuGS, unlike many of the Viking successor armies.
Simon H joined in and commented that it was something that was worth a look at.
Hope I haven't misrepresented anyone here!