As noted above, I did say Queensland derby. Will go on the record as saying I have lived up north in the past and made a 4.5 hr commute to a Cowboys home game. Your point is a good one though. The Cowboys crowds (in raw figures) mightn't look like Man U's, but by golly they come from far and wide from a diffuse and not large population base.
That said, the Cowboys are a great derby draw in Brisbane (and the Broncos likewise in Townsville) and yes! that distance exists. So a derby can involve a big distance folks.
The Titans drew 31k in Brisbane this year. More than the Sharks (24k) and within 1k-2k of the Roosters (33k), Eels (32k) and Sea Eagles (32k). If that's crowd poison, I'd be willing to wager that any number of teams south of the border wouldn't mind drinking the Kool Aid.
Edit: You said in the "low range" and I suppose I should address that directly. We have low crowds (20s) and high crowds (40s). I consider those low-to-mid 30s crowds our bread and butter, and the Titans are right in the mix there. Yes, I will concede that is our second lowest crowd of the season, but the difference between the Titans and those other crowds I listed above is little more than statistical noise. IMHO, of course.