Been watching this thread since I noticed my upload was showing around 3.3mbps of my 5mbps upload. Now mine too is back to normal;
And I just noticed I'm number 13 on the fastest members list? You guy's n gal's with the super-fast connections need to test more often!
Before:
https://testmy.net/vhmnYlk.png
Now:
https://testmy.net/4TEBplR.png
DOCSIS3.0 would likely not help the upload but may help your download as 3.0 has downstream channel bonding even if your not using a 3.0 required package from the isp I don't believe they bond upstream channels yet there was a good thread on the forums here a week or so back about it