Is the Nikon 70-200mm f/2.8G AF-S VR Nikkor Lens sharp? This page visually answers that question. Shown above are 100% crops from a lab-captured 80mm f/3.2 test image. Observe the contrast and resolution of these results.
Is the Nikon 70-200mm f/2.8G AF-S VR Nikkor Lens set to 80mm f/3.2 sharper than the Canon EF 70-200mm f/2.8L IS USM Lens set to 70mm f/4.0? The image quality comparison above also answers that question. Switch between the results to see the sharpness differences between these lenses.