If you really want to, then sure; I was going to give him a little slack considering he is being tutored and everyone does kind of need a first time reffing.
However, if you intend to find a subref, then by all means do so, but it might take more time to find another ref than it would to wait for BiGGiE to finish the reffing. :/
In any case I think it would be a good idea for you to let him know you intend to find a subref should he go too far over the DQ time.
EDIT: heh, looking at BiGGiE's post under mine, he apparently has the reffing finished; I'd say to go ahead and have him post the reffings if Darkamber continues to be inactive, and if you see any mistakes, point them out yourself -- I believe you are a ref?