Also CDN providers will hopefully have good pearing. My company uses OpenVPN TCP on port 443 for maximum compatibility. When around the globe the VPN is pretty slow, so I proxy the tcp connection via a cheap VPS, and speed goes from maybe 500kbit/s to 10Mbit/s, just because the VPS provider pearing is way better than my company "business internet". (The VPS is in the same country as the VPN server).
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Also CDN providers will hopefully have good pearing. My company uses OpenVPN TCP on port 443 for maximum compatibility. When around the globe the VPN is pretty slow, so I proxy the tcp connection via a cheap VPS, and speed goes from maybe 500kbit/s to 10Mbit/s, just because the VPS provider pearing is way better than my company "business internet". (The VPS is in the same country as the VPN server).