IB Lateral Process - are Headhunters helpful?

Hey all -

For those of you who have successfully lateraled or have seen a lateral hire at your respective firms, would appreciate any insight into the process. For reference, current An1 on the West Coast looking to make a move to NY. At a solid BB/EB so should be minimal issues moving up market.

Specifically, are there legitimate headhunters that recruit for lateral positions or is the vast majority of successful moves accomplished through connections / networking?

Many thanks.