Why the adverb "lately" is sometimes used with the present progressive?

Question

The following example is from this video. It is at 5 minutes and 48 seconds.

You are killing it lately.

I am confused because as this dictionary says the adverb is usually used with perfect tenses, shouldn't have the teacher said the following?

You have been killing it lately.

Answer 1

You are right, the teacher might as well have said: "have been". Both describe a new and/or temporary situation, which has been/is occurring lately.