Tier 2 is like the rest of the world - plenty of d-bags and plenty of good folks, all mixed together. My escalation rate hovers around 1-2% most of the time and it's almost always a mandatory escalation, but they still whine about it half the time.
And there's no reason to pretend that there's some mystical magical quality about the tiers either. I got an account security consult from a tier 2 advisor last week, after the T2 had already received the consult from a T1 and reset a guy's security questions on his own. The reason I got the consult - the caller was worried about someone else having accessed his account. What the hell am I going to say that the T2 advisor couldn't already have said?
"Have you seen anything unusual?"
"No."
"Do you recognize the two email addresses on the account?"
"Yep. They're mine."
"Have you received any emails from Apple about your password being changed or a new device using your account?"
"Nope."
"Any unusual charges on your credit card?"
"Nah."
"Okay dude, you're good. Thanks for reaching out to the account security team."
Then you have cases like the last one I escalated, where the caller was a real jagoff who went straight to the supervisor request before I could say a word. I asked for his number; "I only have one number and you know what it is!" Asked for his email address; "You know my email address. Quit wasting my time! Get me to a supervisor right now!"
Nothing I could do but honor his request, so I consulted and gave the T2 guy the rundown. The T2 guy said something along the lines of this being just another day at the office for him and he appreciated the heads-up.
It's a mixed bag, as is everything else in life.