Chopin is the only server left to be transferred and it’s currently at 65% done.
No, Its does not slow too much...
your site is loading slow because your server is chopin and currently chopin is under migration..
It depends on what is in the iFrame.
If you load a full webpage, including javascript and css files, it can easily take longer to load.
Even if you just take content out of the main page and load it through an iFrame, the browser has to make another request to the server, which takes time.