context is everything and then along came lsd to magnify it all and the dimensional borders began to slip like a fault line gone wild
By the middle of 1965 the new bohemia that had been growing relatively out of sight in America was electric with possibility, and the time for breaking free, waving goodbye, and “plugging in” to a new reality and art form had arrived. Grateful Dead lyricist Robert Hunter remembers it happening very suddenly and unexpectedly. “Out of the blue sky appeared the Beatles, the Rolling Stones and [the electrified] Bob Dylan. Add a little acid to that and your orientation changed very quickly.”
The Grateful Dead were more than equal to the task of moving people to light through speed. Ken Kesey even termed them “the faster than light drive,” and they were to prove his words true time after time in concert as they “pushed the limits of the most fundamental urban blues and folk riffs up and out beyond the realms of time and space, erecting huge spiral edifices of sound that seemed, after fifteen minutes, twenty minutes, a half an hour and beyond, to be fueling themselves, hurtling around the room in a perpetual motion centrifuge.”
The Yardbirds on the other hand were more than happy to bring an extended song to one climax. Of course, they weren't playing to an audience of acid=eating dancers at a san francisco ballroom. But they were a model and an inspiration all the same.
"The power of accurate observation is commonly called cynicism by those who have not got it." — George Bernard Shaw (1856 - 1950)