Toyota doesn't like plug-in hybrids?

A Hybrids-Plus plug-in hybrid

"A number of serious hurdles stand between current technology and the reality of getting plug-ins on the road, Justin Ward, an engineer with Toyota's Advanced Technology Vehicles, said to an industry gathering at the annual Management Briefing Seminars. Even if the vehicles do make it to market, he said, data shows a battery-powered plug-in may be no more efficient in reducing carbon dioxide emissions than the gas-electric hybrids on the road today."(more)

Is Toyota correct? Are plug-in hybrids problematic because of safety, expense and real-world environmental effectiveness? Or, is GM's plug-in technology, such as the Chevy Volt plug-in hybrid, more sophisticated and better suited to electrification? Thus, Toyota realizes that GM has a competitive advantage if plug-ins are developed?

Additionally, if lithium batteries can be added to hybrid vehicles, could regenerative breaking and/or regenerative breaking + a tiny fuel cell be capable of producing many of the same plug-in benefits without plugging in the hybrid?