It's a website forum, you can say anything. Maybe he did experience an IS-F in Lexus Dlr, or he just a typical so-called "keyboard driver". But, who cares an nobody's comments. If Shumi said "IS-F's gearbox sucks, it responses like a camry". Then, we can discuss "Did Shumi ever drive a camry?". That's more interesting.
You should never response such kind of reckless comments. .. my suggestion.