Without stating the obvious "size isn't everything" why would a smaller operator be more likely to be culled than a larger one. I would say the absolute oposite, and the same for Brokers.
The reality is that brokers and airlines who offer a superior level of customer service will gain higher levels of profit and customer loyalty, so, in a time when customers are thin on the ground keeping the ones you have will always see you through as long as your overheads can adjust with your income.
Of the 3 brokers that I perceive to give the highest level of customer service, one is a 2 man band, one is about 20 people, and one about 60 ish.
of the 3 brokers that I perceive to have the lowest service levels, one is a 2 man band, one a 4 man band and one about 50 people.
Phil