How to tell if it is an amei ha'aretz shul

This Shabbos Parshas Shekalim , most shuls will say Piyut (Yotzros) during or after chazoras hashatz. 

The Piyut said during chazaras hashatz  is called Kerovos *1 or Kerovotz *2.

Adding Piyutim to the tefilos started in the times of the Gaonim .

When the minhag started ,there was strong opposition from some of the Gaonim.

The  reason for opposition was:

   1) Meshane Mimatbea  Shetovu Chachomim (changing

the nusach hatefillah that the Anshei Kneses Hagedolo established.  

2) Hefsek in middle

of the tefillos.

The Otzar Hageonim ( Brochos 178-180) quotes R. Nachshan Gaon 

“ In the Mesifta and wherever there are Rabanan they don’t change the tefillos from the way the Rabanan established. They also don’t bring in to the Bais Hakneses a chazzan that knows piyut.

A  Bais Hakneses where Piyut is said, testifies on themselves that they aren’t  Talmidei Chachamim.”

          *1 see Abudraham 2 reasons why it’s called Kerovos

              *2 Tosfos calls it Kerovotz (Brochos34a A.Z. 8a)