That blocking the CDN improved your loading speed doesn't provide evidence of throttling. It's equally plausible that the CDN is slow for everyone, whether you'

That blocking the CDN improved your loading speed doesn't provide evidence of throttling. It's equally plausible that the CDN is slow for everyone, whether you're a Time Warner subscriber or not. The way to verify this would be to connect to that CDN from different ISPs with similar routes and see if there appears to be a hard cap in one connection but not the other.