Aside from the Terminator being better than iTerm2, he's pretty spot on :)
Konsole has been my daily terminal emulator since the move from GNOME {2,3} (since the removal of fallback mode which subsequently disabled compiz fusion, also breaking a lot of my long term formed habits) to KDE 4.10 (now latest plasma 5). Cannot complain.
However, there is a new GPU accelerated terminal emulator emerging - alacritty which claims to be the fastest in the business. Looks promising (I've tried it) -> https://news.ycombinator.com/item?id=13338592