Use of Communication Client Business Service method IsTheLastSession to control CTI sessions.

There is an undocumented method IsTheLastSession on the Communications Client business service.

It can be used to control things when there are multiple live CTI sessions:

• deciding whether to logout from the CTI queue { How Can AutoLogout Be Implemented with Server Script? (Doc ID 477576.1) }
• deciding whether to block particular Event Handler / Event Response combinations from completing { Multiple CTI sessions and usage of "Reset Active Session Count" (Doc ID 505535.1) }

I am aware of the advisability and recommendation of setting MaxCommToolbars = 1, but situations can arise through either design, or browser crashes or hangs.

My question is, does this method work across multiple servers ?