Some observation about YT PVA and time

At the moment I am fucking around with youtube account creation and still get caught by PVA from time to time, what well ... pisses me off.
So I started a little experiment, I've made a little programm, that writtes down the time I need for registration and saves it to text files so I can see if it has anything to do with the time I need for every registration and yes, It seems so, I was able to get my successrate from 50-75 somewhere to 90-95 by following the rule of thumb 50 seconds for the first page and 60 for the second.

I'll attache that log files and before you ask, yes there doesn't seem to be a clear border between getting caught and staying clear, I have four theories at the moment:
1. It changes with the time of the day, I mean, that sometimes you need 70 and sometimes only 40 on the second page to stay clear.
2. It depends on the amount of people registering at the moment.
3. It's just random, when you get near to a specific border, the chance of getting a PVA rises.
4. Youtube scans the account names and gives you a PVA when the name sounds spamish.

Personaly I think the last two theories are worth looking into and perhapse this will help some of you.

Every line of the log file is a new account creation, looking something like this: 123/45
The first is the seconds needed for the first page and the second, well take a guess

edit:
Naturally this won't replace the need of new IPs, cookie clearing and taking all other security measures available.

well, use fakenamegenerator.com so the user seems real, and use yahoo mail accounts and you won't be having any problems. And the PVA appears also if the ip/proxy was used for creating a large number of accounts. my 2 cents

Yes, I know that, I change the IP, deleted the cookies and used hotmail accounts so I got quite a good rate, the names where created with lists of real first- and surnames, so they are all real, although some of the combinations sound odd.
But still there where quite a big bunch who got a PVA, so I thought that it may also depend on the time and well, I thought it may be usefull for people who create YT accounts in bulks.