I feel this pain, especially since I'm hoping to get my PhD over the next 6 years.
Bruh
If you shoot for 5 it might take six. If you shoot for 6 it will take 8. I know you can't read too much into such a short comment, but do some serious introspection. You're setting off like every alarm bell for someone that's about to get absolutely hosed by a doc program.
I'm all for doing serious introspection before (and during!) a PhD, but the comment is way too short to set off many alarm bells for me.