I was skeptical so I downloaded some SPECint benchmark results ( https://www.spec.org/benchmarks.html ) of T1s, Power and Xeon, compared them and thought "mh, probably a bad idea" and then I ended up having to invest quite some time to convince my management to keep using "normal" servers.
On the other hand, later, I had a bit of fun hearing stories from other colleagues telling me how slow those T1-machines were once they started running on them their normal DB-workloads => after months of everybody complaining about bad performance, everybody went back to normal servers => a lot of time & money (& nerves) spent for nothing.
Normal IT politics, I guess.