Virtual classroom - anyone else find the sound problematic?

I've been trying out lessons with various teachers in the "virtual classroom".  

I was a little surprised to see (courtesy of the new video link format) that the teachers were just using a standard pair of Apple type in-ear bud headphones with the small microphone that hangs inline from the cable about chest height, rather than a typical tele-operator headset with microphone on a boom at mouth height.

I have found the sound quality quite problematic on a number of the classes I've had, which I think is down to this (although it could be Skype I don't think it is).  I have mentioned this to CP who were quite responsive, but said I was the only person to have had this issue and mentioned it.

So, I wondered has anyone else had this same problem?  If so please let me know.  Or if you've found it fine I'd also be interested.

Mark