Many years back crossing from the north side of Oregon to the south side showed a noticeable drop in home prices. With the many new homes and other changes to Palo Alto, that is no longer true.
Eventually the tract homes will be remodeled or replaced changing the feel of the neighborhood. Prior to the problems with the economy this looked like it would be happening fairly soon. It's harder to say now.
Much of what drives home prices is schools. The ventura neighborhood does have good schools.