yeah they do, just say your getting the rate that you want at your current broker but you don't like their customer service and looking to switch....i'm getting a lower rate at one of my brokers below their lowest advertised rate
a few years ago i was working on a few models to see how correlated increases in money spent on lobbyists by corporations to their stock price.....in most cases it nailed it right on the head and on others it didn't, don't know how accurate it was tho since i was using incomplete data sets