The answer is that it is a mix.  If you're buying any new plans now, it will be the higher speed profile. 
The 30/10 is a bit of a special case.  We buy the higher speed input, but we restrict it down to the 30/10 L2 speed - so it essentially looks like we're buying the lower speed input.  There are various reasons as to why that I'm not going to go into.  Not that happy about it, but it is the way it is.  It won't be forever.
If anyone on 30/10 is feeling desperate for a tiny bit more speed, then PM me and I may be able to tweak this on a line by line basis.   No guarantees.

Yes 200/20 and 100/20 are "overdimensioned".