The `_ (500 ms delay) guru.dat code causes pauses before any typing/response is given (instead of during/interspersed)
These Guru delays are supposed to be expanded/take-effect in the middle of the response (like thinking time), not before.
Not sure how long this has been broken, but presumably for a very long time now. The logic that's parsing the ` codes is where the delay is taking place and this code is then stripped from the string that is then sent/typed back to the user as a response.