Hey Martin, thank you for taking the time to verify the proposal and for pointing this out!
You are correct, there’s an error in the written verification steps and the expected threshold should be 5e21 or 0.5% instead, so the on-chain value is correct in this case. This is consistent with the value used in recent token launches (see PUSO, tx#14, GHS tx#14, cCOP tx#14).
This can also be verified on-chain by querying the MedianDeltaBreaker contract, for example on the COP/USD ratefeed:
> cast call 0x49349F92D2B17d491e42C8fdB02D19f072F9B5D9 "getSmoothingFactor(address)(uint256)" "0x0196D1F4FdA21fA442e53EaF18Bf31282F6139F1" --rpc-url https://forno.celo.org
5000000000000000000000 [5e21]