only reason for the suggestion was for a safety concern. if you're doing a rip cut on plywood, the saw can kickback and find it's way to your thigh. an experienced circ. saw user knows where to stand and proper safetly precautions. using a table saw promotes nice straight cuts, granted the fence is setup right.
when i was cutting my wood for the garf stand, i screwed up 1 cut on one of the horizonal supports, and i have used a circular saw a good many times. [i eventually replaced that piece of wood] if i had more access to a table saw, i would have used it to cut everything. since it is alot easier, faster and safer to use. thinking about it now, i tend to agree with that a circular saw might be a better choice for a beginner, if anything it's more versitile.
sati, if you going with a circular saw, just make sure you learn the basic safety, cutting methods, and practice using it before you start cutting wood for the stand.