Nice to see a lot of improvements! I spent some time today to upgrade an app from Apollo 1.9. I ran into some issues if you use TypeScript.

The typings used in the library are not listed as dependencies, so I had to manually install them. This may get fixed soon (https://github.com/apollographql/apollo-link/pull/171), though I had to install three @types packages: graphql, lodash.flowright, and zen-observable.

The ApolloProvider parameter for client is also broken: https://github.com/apollographql/apollo-client/issues/2212

Also, `data.loading` still gets stuck to true. See https://github.com/apollographql/apollo-client/issues/1186, though this issue has repeatedly been opened and closed.