I clearly said "none of Chester's solo material that's come out to this point." That means Morning After, Let Down, Crawl Back In, Fire, Walking in Circles, My Suffering, and In the Darkness. The chorus of Let Down is so simple from a lyrical standpoint that it could've been written in 2 minutes.
We don't know who wrote what on most Linkin Park songs. Mike writes all of his rap parts, but they both write some of the singing parts. Also, I didn't infer in any way that Chester wrote those songs himself, I was making a comparison. But Meteora was the album Chester had the biggest hand in writing the lyrics for (some of the Hybrid Theory material was written before he joined the band or by Mike, and Mike wrote a ton of lyrics for Minutes to Midnight), and it's by far their weakest lyrical work. Probably not a coincidence.