"We are good, they are terrible!"
Translation:Tha sinne math, tha iadsan uabhasach!
Just to add to Morag’s reply – the emphatic endings are used here because you contrast the two: we (and only we, not they) are such, they (and not we) are such.
It’s very common to use the emphatic endings in such contrastive manner, showing the difference between one person (or group) and another.
Also, when mirroring a question after answering it, you’d probably use the emphatic pronoun, eg.:
Dè an t-ainm a th’ ort? What is your name?
Is mise Calum. Agus thusa? (or maybe Calum. Dè an t-ainm a th’ ortsa?) I am Calum. And you? (Calum. What is your name?)
Indeed, the "yourself" construction is heard quite a lot in Scottish English and may be an influence from Gaelic.
I swear I heard something that sounded very much like "... a th' annamse" a couple of times when watching TV earlier this evening. I wondered if I was mistaken but from what Silmeth says that seems to be another example.