How long should a volume lash fill actually take?

Hey guys, be honest with me. How long does a standard volume fill take you? I’ve been lashing for about a year now and it still takes me a solid 1.5 to 2 hours to get a volume fill looking completely full and dense. I feel like I see all these techs on Instagram claiming they do them in 45 to 60 minutes flat, and it's making me feel so slow. Am I doing something wrong, or are they just cutting corners? How long are clients actually sitting in your chair for a standard 2-3 week volume touch-up?