For example, when I click on a Facebook picture, the picture remains pixelated for about 30 seconds, then starts to clear up. Or when I watch YouTube videos, I can't watch them on HD without running into buffer issues. Windows 7 is just much snappier. It might be an issue with the graphics card.
Dualbooting Windows 7 64bit & Ubuntu 12.04 64 bit
Specs: CPU: Intel® Core™ i7-2630QM CPU @ 2.00GHz × 8 RAM: 8GB DDR3 HDD: 50 GB to Ubuntu & Remaining 1.5 TB to Windows
The interesting part:
Graphics Card: On System Settings in Ubuntu: Intel® Sandybridge Mobile
Graphics Card: What it should be: Radeon™ HD 7690M XT switchable graphics with 1024MB GDDR5 and up to 5093MB total graphics memory