Too many adverbs?

Hi, I have found this sentence in the company brochure of a language school:

Although the [company name] has grown considerably since opening, it is happily still a relatively small school with a famously friendly touch.

Now, I have counted 5 adverbs in this sentence and I think that’s too many. It’s difficult to understand the meaning of the sentence, especially if English is not your first language. What is your opinion on this?

I don’t think it’s so much the number of adverbs, but the presence of so many ending in -ly. The sentence sounds like “ly ly ly ly ly ly…” However, I don’t find it hard to understand. Let’s see what other native speakers think.