According to some studies, composites when infused with NGP are stiffer and less prone to failure than composites infused with carbon nano tubes or other nanoparticles.  These gains are in the area of 1 order of magnitude.
When added to polymers, NGPs mechanical strength exceeds that of Carbon Nano Tubes (CNT).  NGP and CNT can have similar functionalization or surface treatments to improve mechanical bonding and electrical characteristics.  NGPs superior shape (grid like or fence shape) gives a better mechanical attachment than the CNT tubular shape, this unique shape gives NGP significantly higher strength, puncture and crack resistances, as well as excellent permeability barrier properties.  These improved properties can be seen in a host of different materials.
Super capacitors can perform better when made with NGP.   NGP based nanocomposite materials exhibit high levels of capacitance and electrical conductivity as well as demonstrating chemical stability and low mass density.  The conductive film is superior because of the unique molecular shape of the particles, which can store more electrons than other known materials.
When adding 1% to 2 % NGP by volume to aluminum the electrical conductivity and strength are improved significantly.
By David Graber in association with Nano Enhanced Wholesale Technologies, LLC    http://www.nano-enhanced-wholesale-technologies.com/

References and Additional Resources
Graphene Outperforms Carbon Nanotubes for Creating Stronger, More Crack-Resistant Materials by Professor Nikhil Koratkar    April 26, 2010    http://news.rpi.edu/update.do?artcenterkey=2715
Angstron Materials Inc.     http://angstronmaterials.com/