I simply got around to setting up mod_deflate on my small server. I additionally added the next to this site Optimizer in cPanel:
Now, the website shows considerable improvement in loading time (almost 3x!), but ySlow continues to be giving me an "E" rating for "Compress Components with gZip". It shows 4 .js components not Compressed.
text/plain. Browsers don't generally care what kind is distributed within the
Content-Type, as it is the kind indexed by the
Bingo! Recognized what the issue is. For other people who appears to become facing exactly the same problem: