I think so too. Starknet was too hasty to say that, and look at it now to compete with meme coins like Dogecoin alone, he is not able to let alone with Solana.
Arbitrum is a project that has a large royalty for the community, it is now ranked 43 CMC, Optimism is ranked 31 CMC, and Starknet is ranked 57 CMC. Is this good news for Starknet? Of course not.
I think every project has the right to say anything about themselves, whether they want to beat Solana, Ethereum or Bitcoin in terms of technology, community or capitalization. Besides price-chart marketing, marketing with shocking statements is also very popular in the market.
We already know that EOS once called itself the "Ethereum killer", so Starknet can also call itself the "Solana killer" to get attention in this crowded market.
I haven't experienced Starknet yet, but following the project's development: TVL has reached $1B and temporarily Max daily tps = 15.5, not too bad, its only problem is that it doesn't have many users yet. I hope Starknet will develop more in the future, so that what they say doesn't become a joke for the community.