Is fiber optic internet

I am excited because as I write this a hole is been dug in  my yard to run new fiber to our house.  The internet provider is finally putting fiber in our area.  I should be able to get it in a few weeks.  Everything will be brand new.  I have had copper for years and it gives us problems constantly.  I assume this will very much improve the sound while also lowering my bill.

The question was specifically "fiber optic INTERNET." (vs a  fiber optic home network component)

That itself cannot theoretically offer any quietness advantage over Internet over copper.  However, theoretically, if a network was making any noise at all that could theoretically affect your DAC, then having fiber optic as the last leg into your streamer could theoretically result in a theoretically cleaner signal to the DAC, theoretically. But a good DAC should clean up any of that theoretical noise anyway. 

Lot of theoretical there Jim @jji666 I have both Fiber to my house and a fiber home network (I converted) and it was a night and day difference in performance and quality. Nothing theoretical about it.

It is all about the converters... light to electrical. The rule of thumb used to be no because of the cheap optical to electrical converters. Only occasionally now yes, because of audiophile quality optical to electrical converters. Otherwise high quality electrical filtering and isolation is better. 

Firstly, the difference that may or may not be heard changing between copper, fibre and wifi seems to depend alot on how revealing your sound system is, how low the noise floor is, and how noise each network device generates.  I am quite sure the noise that a network device experiences (input and self generated) affects its performance and 'somehow' can affects sound quality.  This is based on heaps of experimenting with a range of audiophile and generic network devices, cables and tweaks.

I am quite sure coax internet service will most likely transmit more noise into your devices than fibre, far more than the SFP module.  The first device (optical termination) may add noise to effrct8ve reduce the benefit of fibre.

Then, your network devices add more noise baxk,such as switches and Fibre media converters can add noise back.  Then cables collect some noise and transmit it in your network.  Network isolation transformers  (in switches, routers) seem to do little to block noise, fibre seems to block more.  In my experience, it is worthwhile trying to optimise every device, power supply and connection (cable, etc) in the network, especially in the direct route from internet to streamer.   It can be costly so try to keep perspective and commensurate with the calibre of your other gear.

I have fibre optic internet service, SFP+ router, fibre, and finally wifi  connection to Mt Devialet ... so I'm not an advocate for any particular medium, moreso an advocate to use whatever gives the best value solution for each connection.

Fibre is great value for long runs where $1k per metre for audiophile cable is not feasible/good value.