Spotify Lossless and Sonos Play 1 and 3

I have enabled lossless in my Spotify account on the desktop and my phone as well as installed the latest software update for Sonos from the S2 app. Does this mean lossless should be playing through the Play 3 left and right speakers I have in one room ( as well as the sub and playbar) and Play 1 left and right speakers in another ( as well as sub and playbar)? Spotify on the desktop connects to the speakers and does from my phone too via S2.  It may be my perception but the sound certainly seems to have improved and I am hearing the music in a way that appears so much clearly defined and crisp than before. If lossless is not supported with my set up then the improvement is a figment of my imagination.