This is despite the fact that at the conference, Buterin said that more than 10,000 programmers from around the world took part in the development of Ethereum 2.0.
How many programmers do you have at the moment?
LOL... That is not true at all. We're launching our testnet about the same time they're launching theirs. This includes only the beacon chain which is the consensus mechanism and runs CASPER/attestations. I'm collecting public keys for validators for the testnet now from volunteers from the community. I'll finish this process Friday. Then, we'll start the testnet sometime next week (most likely Tuesday 9 PM PST if all goes to plan). This testnet includes beacon chain block proposals, attestations, CASPER.
Prysmatic's beacon chain does not run on multiple nodes yet (single client as stated in their release). Ours is multiclient. Also, they don't have attestation sharing through their P2P network. We do. Finally, I believe they're using Phore's code (specifically the BLS library) in ETH Serenity (2.0):
https://github.com/phoreproject/bls/issues/5. Phore Chia, Algorand, and ETH are working with cryptographers to finalize an IETF document standardizing BLS signature implementations.
I'm also working currently on getting a block explorer up and running so that the public can see the testnet beacon chain progress and validate attestations.