That is actually an interesting topic.
In Poland, the trains are often late, from 10-15 minutes (local lines), up to a few HOURS (intercity). Some of the trains look like total wrecks, and I'm surprised they even work, but over the years those have become a rarity. The new ones even have power outlets, so you can plug in your laptop or mp3 player.
Buses are mainly the same story, except with no power outlets (obviously), also the ticket machines inside them rarely work
How does public transport look in your country?