I'd buy that argument in a buyer's market. But I'm not aware of too many recruiters with a surplus of sourced tech talent right now. And they have to go through a lot of effort to source someone...so I'm going to still stand by my comment that a good recruiter is going to maximize the candidates value.
Edit: I'd also add what tech talent is going to be so unaware of their market value that they'd take 50% of it?
Edit: I'd also add what tech talent is going to be so unaware of their market value that they'd take 50% of it?