sounds like her mouth goes into action before her brain has a chance to formulate a sentance, so the auto pilot kicks in with filler words until the brain catches up!
it could also be a sign that they do not really know what to say e.g. i asked the senior pdoc a question about my dx, he looked at me and after a few minutes said well, ermmm, ummmm it errrm ummmm is ermmm ummmm at which point i jumped in and asked if he actually knew anything about my dx! his reply was well ermmm not really! so i ended the meeting there and then until he or a collegue had the answers i needed!
so although a person is highly qualified or intellectual there may well be situations they know nothing about even within their field of expertese. some intellects are on such a level that they lose the ability to communicate effectively with the lay person any longer, as though plain simple English becomes almost like speaking a foreign language for them!