Originally Posted by
abmccray
That's not really what happened.
18 was *surprised* by Future Trunks/Goten's power (as was everyone else, including Teen Gohan), but that whole fight was more of a "how seriously do I need to take these kids" thing as she got more and more serious, but still underestimated them quite a bit, until she decided to just end it due to there even being a possibility of losing (due to not knowing their upper limit yet).
The androids don't sense ki, so they go more on what they see than anything.
Goten and Trunks are *somewhere* around Freeza where he can at least give them somewhat of a challenge. They're somewhere around initial SSJ Goku level. Future Trunks gets into Freeza stomp level.