Every burning software kinda works all the same when it comes to burning speed. Here's my 2 cents on it.
Each time you insert a different media in your burner, the MAX speed will change.
I have a 16x burner.
If I insert an elto cheapo 4x media, sometimes the effective speed will be x4.0 and sometimes it will say x2.0 because it tests the media everytime you add a disk in your burner.
If you insert quality media like Taiyo Yuden (x8) it might want to burn at x12 or x16.
So yes, it might be anoying, but everytime I burn a media, VSO CopyToDVD, VSO DivXtoDVD, Nero Burning Rom always display the effective speed, then I drop it down to what I want (x2 usually).
Unless you force your drive not to write faster than x4 all the time in Drive Settings, I think CopyToDVD has that !
Does this all make sence, or I just lost you completly ?
Humm I think I just lost myself too