Jamerson's walking bass lines

There's something I've been noticing about Jamerson's lines that I'd like to know your opinion about. It seems to me that 90% of the time he is thinking as he was playing walking bass, but as the rhythm is more varied in the style of music he is playing, he can to insert more notes per measure. But the notes he plays, the way he approaches them, the overall directionality of his lines, seems to me it all comes from walking bass. Makes sense?