Skynet fetches files in under 100ms, you can definitely get a decentralized system going as fast as the centralized web if you build it right.
The main challenge for me with this comment is that you can't expect distributed/decentralized networks to win if you set an expectation that "things will just be slower than the normal web". Nobody is going to migrate to that.
IPFS has chosen an architecture which fundamentally keeps it non-performant, Skynet is built from the ground up in a different way, and gets 10-100x improvements on performance for content-addressed links, and 100-1000x improvements on performance for dynamic lookups (IPNS)
