There's been some speculation about how the fast runs for An Introduction & the verse of The Time Has Come are done, but generally most people agree that some delay is involved.
But don't forget that you can pick everything - it may seem hard, but it is possible, with some practice. Here's the sound file - it starts with a video clip (a first!) of me playing the parts using a clean sound, to show that no funny effects or editing was involved. The 2nd part demonstrates the same line, with some delay and wah.
Here are the tabs:
While alternate picking, keep all wrist & pick movement minimal. Pick with the utmost tip of the pick, and you'd find that the notes become very soft, because the small movements restrict how hard how can pick.