Yes, I have faced the same problem for my website where I have launched few tutorial. I have used the detailed analysis report generated from PageSpeedOptimizer.com and I came to know that the most problem my website was facing was due to the heavy images and render blocking. Even the cache leverage issue was there but I removed it. So yu may also check it and can resolve the issues as mentioned in the report.

Yes, I have faced the same problem for my website, where I have launched a tutorial. I have used the detailed analysis report generated from PageSpeedOptimizer.com and I came to know that the most problem my website was facing was due to the heavy images and render blocking. Even the cache leverage issue was there but I removed it. So you may also check it and can resolve the issues as mentioned in the report.