I agree with all.
I read more than a year ago that readers ignore those simple tags when they come across them in text. I didn't exactly believe that; rather, I thought that we read them, but our brain doesn't process them, as they are more or less part of the background.
But, I have changed my opinion. I just finished reading "The Return of the King". Completing the Hobbit/LOTR books, after having read the entire Dune series (the original six) in the past ten months, it occurred to me that I do just that when reading.
I literally found myself seeing the text "said Pippin", for example, before finishing the proceeding line of dialogue.
If I had a line like "I'm not so sure this is such a good idea," said John. "We could be in for some trouble here.", my eyes literally hopped across that tag, and my brain filled it in automatically, and I kept right on going, without missing a beat in the dialogue.
When an author wants to break up the dialog more, a better style is "I'm not so sure this is such a good idea." John gazed toward the horizon, a look of concern on his face. "We could be in for some trouble here."
That second method forces the reader to slow down and contemplate the danger, suspense, etcetera. I think these two methods are hugely effective at controlling tempo.