I don't believe being colour neutral at 1-2 mins is necessary. I would say at around 15 sec average maybe be White-Yellow colour neutral, but hey, Phillipp weyer and ciaran beahan only start on one colour, so yea.Hi Daz.
Short answer, more than a minute, but less than two.
Full answer, I'm not actually timing accurately, I wanted to get mostly out of beginner method and into enough of cfop before timing as for me I'm enjoying the satisfaction of learning new parts of cfop and knowing I'm improving my solves without it being about time for now.
I took the plunge with "cross on bottom" and am pleased I did, it is much easier and more satisfying, my f2l was becoming good, I had to rotate less and was looking ahead a bit when I knew I had a pair solved and could bang them into place with muscle memory.
I have sorted my issues with last layer and learned enough algs to put together a reasonable 4lll.
All told I was going great, then.... Colour neutral.
I had read enough advice guides which almost all suggested the sooner colour neutral is learned, the better, as it gets harder, so this week I took the plunge and my solves became sluggish, but tbh not nearly as bad as I thought.
I'm going to stick with it, as I believe the long term benefits to my solve will be worth it.
How do you currently time yourself? Stopwatch? Actual stackmat? Laptop?
I don't have any of these tbh, even my phone (temp old one) doesn't have a stopwatch and it wont run scripts for online stopwatches, I might get a cheap stopwatch.