Poor speed to AWS

Anyone from AWS can contact me off-list? We peer with AS16509 in Montreal and Toronto and get really good speed to US-EAST-1, US-EAST-2 and of course CA-CENTRAL-1 but anything else outside the east coast (US-WEST-1 and US-WEST-2 more precisely) is about ten times slower even on multi-threaded HTTP(S) or SCP/SFTP transfers. Goes through two of our transit providers, Telia and Zayo. Thanks Eric