Arrghhh my ears!
Putting together snippets from the story of Malfurion, the story of Broll, and how Druids of the Talon behave in WC3, there is this conclusion:
A druid starts as a stranger: Whispering the wind (or other form of nature) through means of polite requesting and diplomatic manipulation (like when Malfurion played on the windsâ vanity and told them that the Houndmaster (a demon) is bending lightening into his whip, luring the winds into shocking the demon with lightning to kill him).
Then it develops into more skill from the druidâs side and more trust from natureâs side, so they spend less time talking and also possess a stronger grasp that allows quicker channeling. (I.e. Malfurion in Wolfheart and Stormrage, and Druids of the Talon in WC3)
Then at peak performance it becomes whimful; the druid and the forces of nature are now so intertwined that they behave instinctively toward one another; reaching the stage where the force of nature in question is invoked at will (not forcefully, but through very instinctive understanding and empathy between the druid and the force of nature).
You can also see this instinctive and empathic teamwork with one another when a druid goes as far as developing their own reflections of the animal spirits (like when Broll possessed his own reflections of the Ancient Guardians, rather than having to reach out for the Ancient Guardians themselves.)
So the difference between them and shaman when it comes to, say, the wind, is diminutive when it comes to the path of training and the method used.
Bear in mind however that druidism is based largely on secrets and mysticism; endless research, variety; one Shanâdo may research new ways or old and forgotten ways in how to teach and how to channel. They deal in the elements in their most primordial form aka the essence of life, the solar energy which takes colossal shapes in the universe to sustain a worldâs life and warmth, the lunar and stellar elements which maintain a worldâs balance and soothe its creatures; these elements are very fluid and can be dealt with in a great variety of ways, allowing the individual to be creative and distinctive with their approach.
Edit: By âbalanceâ here I meant maintaining the gravitational balance, the importance of lunar gravity and why it needs to exist.