I'm like @Eesha and personally really love an all day stream of consciousness textathon running with a special someone
I've had this with all of my romances apart from the last one and loved the feeling of being telepathic and getting loads of music and funny things sent.
On the other hand it has made the breakups extra hard though as the phone is suddenly silent and no one to share the mundane minutiae with.
The last iron was not a big texter. In hindsight this turned out to be one of the early indications that I was never more than a FB/FWB to him but I liked trialling the model of not having a running correspondence.
It was enlightening as less distracted throughout the working day and at home but also less secret smiles.
It was the sliding of the bare minimum 'morning' & 'hows your day going?' texts which have me the first clue his interest was waning then they stopped altogether.
I initially did what you did @LongtimelurkerL & sent a test text and got a response back pretty swiftly & a few more days passed with us in contact but eventually the comms stopped completely. It did help with moving on though the texts weren't absent as never really there as much as I wished they were.
For me it's on my must haves to 'give good text' which for me means plentiful and high in quality content. And witty.
A two day lag is not for me. Maybe after we've been an item for ages but not in the early wooing days.
There's always something going on in the world to comment on, and decades of personal history to share, new music etc to pass on.
I quite like the fact that I'm conducting a prolonged personal social science experiment through dating by testing these preferences. I now bin people off of their texting style doesn't match mine.
Next to test is my stated must-have of 'Over 6ft - I only fancy tall blokes so sue me' with my offer of a walking date with brand new iron who is same height as me. He's funny, clever, chatty and lots of other nice things so happy to go and see what we make of each other in person.