I have no experience of the teacher in question, but it may be more appropriate simply to rejoice that the new media enable such a teacher to reach so many people.
I believe that a person may establish a strong affinity with a teacher remotely and as Greg has said, it can also encourage a person to attend a live event.
The impact such an experience may have on an individual is not something easily measurable, surely. After all, if pure intentions and pure teachings are given and received, our minds determine how we benefit.
It's exactly the same with a 'live' initiation, isn't it? Sometimes we may not make a strong connection with the teacher, the deity or even both, as they are so tightly bound together.
One of the perils of desiring an empowerment in order to perform a particular practice is that the choice of Guru may become secondary. At least the media available to us enable us to form some connection, possible even a strong one.
I can only relate that I have attended some 'live and present' initiations where I felt empowered but not inspired.
Equally, I have experienced an initiation over the web which felt every bit as valid as many 'live' initiations, but I admit it helped greatly to have received several 'live' ones as there was some familiarity.
One Rinpoche whose instructions I attended purely from interest decided to give an empowerment for those who wished it . It blew me away, yet that was true only for a handful of people there.
So for me, I feel that there are many benefits, but the outcome for those who feel nothing from a remote experience is just as legitimate - we really don't need to declare a universal 'best'.
As they say in India: 'Same, same.........but different! ' LOL