That is my opinions,
If you just change your domain name server from verisign to ns1.sedoparking.com.
The verisign, and sedo almost immediate change it.
If you change your local pc domain name server to the ns1.sedoparking.com this ip address 217.160.95.94, then you can got your change.
eg:
c:\>nslookup
Default server: You local pc point the domain name server for you.
Address: xxx.xxx.xxx.xxx
>set q=any
> YOURDOMAIN.COM [FirstEnter]
> server ns1.sedoparking.com
Default Server: ns1.sedoparking.com
Address: 217.160.95.94
> YOURDOMAIN.COM [SecondEnter]
You will got the difference values for your [FirstEnter] [SecondEnter].
[FirstEnter] is the data, that buffer and cache for your original data
[SecondEnter] is the data, that you exact want data.
What time will be effective the [FirstEnter] and [SecondEnter] Data?
My experience was almost 12 hours.
They will show the exact same values for you both [FirstEnter] and [SecondEnter].
PS:[propigate][progogate] what the words meaning, I can not check it out on dictionary.