What is the range of special costs awarded by a registrar?

On the question of the amount of special costs to be awarded, in Kooner v. Kooner, 2007 BCSC 532, Registrar Sainty held at para. 24: It has also been noted, as a “rule of thumb”, that special costs ought to be assessed at 80 to 90 percent of the actual “solicitor-client” accounts. That “rule” however is simply a “rule of thumb” and, in my view, a registrar assessing special costs ought to apply the factors enumerated without recourse to any “rules of thumb”. Registrars have, on previous occasions, awarded as little as 50 percent and close to 100% of the amount claimed as special costs.