I disagree that snow on approach will always mean snow on the actual ridge. My last trip to Whitney / Russell area was in February and we found the East Buttress of Whitney, including its shaded belay ledges, completely free of snow. The so called technical part of the ER is relatively exposed to both wind and sun and I think there is a very good chance that the true ridge will be clear when he attempts the hike. Of course, you can always find snow in shaded areas but, again, there is a good chance that it can be completely avoided. Of course, and as I mentioned earlier, I would bring an ice axe and crampons and prepare for the worst.