> A [...] framework for fast navigation and page updates Not sure what the criteria for "fast" is, but on my 12' MacBook with Safari, it's consistently faster

> A [...] framework for fast navigation and page updates Not sure what the criteria for "fast" is, but on my 12' MacBook with Safari, it's consistently faster (and less glitchy) to just load a new Youtube page than to let this "fast" navigation do it. Using Youtube is actually painful because of this.