UPDATE: 11th June 2019 – Yes. Decentraland is currently hosted on 3 centralized servers, with the plan to progressively move all content over to decentralized servers once all moving parts are in place.
Official DCL AMA Answer: (19.11.2018)
“We’re not moving away from IPFS. We received too many complaints about our current approach, the number of frustrations it was generating forced our hand here. We’re building an alternative IPFS/IPNS gateway, completely replicable and compatible with IPFS/IPNS nodes (the data and messages are the same).”