One advice: be careful when you make claims like this, even if you are an extremely competent programmer, because it sounded extremely aggorant.
Picking up a new tech (framework, language, etc) during the job vs having years of experience building things with the tech makes a huge difference in terms of productivity.
Being language(or framework)-agonostic is cool. But saying languages are very similiar indicates that you probably know none of them in depth. Every language (or framework, etc) is its own microcosmo. (i.e. at the compiler level, design-pattern's level, etc).