CE, Gold and Silver qualify, which is essentially pretty much everyone who would be attempting this, I'd think. I would not, personally, chance a true B2B from anything other than the front of the plane, and I'd always use Fast Track security.

If there's a queue at immigration, the staff will invariably guide you to the front which will regain five of your 7-8 minutes, making the experience much more comfortable.

In my mind, there's a much bigger risk of getting held up from a Y seat on the plane than being irretrievably caught at immigration, which might suggest there's an awful lot you can do in terms of self-help.