I think the bond varies on personality too. All of my gliders are bonded to me, except for one boy who is taking a while to warm up. But my bond looks different with almost every one of my gliders!
One of my boys will fall asleep in my hand and let me hold him with no problems, but he prefers to perch on my hand instead. Or snuggle in to the crook of my elbow. He's also a big groomer, and will absolutely soak my hand cleaning me :)
One of my girls will pass out in my hand, completely limp, and let me pet her everywhere without waking up. And when she does wake up, she'll just hug my thumb tighter, tuck her head down, and go back go sleep. She is my biggest bra baby, and I can trust her in my bra when I go errand running. I bring a bonding pouch just in case, but I've never had to use it. She will sleep through anything!
Another one of my girls will sleep in my hand, but she prefers to just sit in my hand (again, holding my thumb), and stare at me. And if she isn't too tired, she'll climb out of my hand, scoot down my shirt, and start grooming me.
Then I have a boy who, every time I open the cage, will try to leap out onto me, run up my arm and down my shirt...and refuse to leave. He doesn't really like to be held, he would rather sit in my shirt, peeping out at the collar.
For me, I think a glider is bonded when it comes to greet you when you walk by the cage or call for it, when it will fall asleep in your hand or shirt, when it jumps to you when it's spooked, and when it glides to you or perches on you when out of the cage.