Usually only one lane available, and if two, only one person checking tickets, so not as far as I know.
Closest I've come is a personal call (to mobile) when there were only 3 travelling, by the gate agent.
I've never seen a QFLink PB lane either, although most of my flights have been BNE <-> NTL, and I wouldn't expect one at NTL anyway.
I've never had the personal call either, but once at BNE a lovely young QFLink staff member drove me out to the plane in a car, rather than on the full bus. That was nice (and I'm only SG).