Last time I've tried it was about 9 months ago and that was really an issue.
But I also think that for people that didn't try a "snappier" alternative, it was possible not to realize it's there.
Try and make a comparison with Parsec of even the Steam's own streaming. You will notice a big difference if the issue still exists.
i did a test with just spamming date in a terminal and having a high fps video captured from my phone, it was usually under a frame (granted 60 fps so 1/60 sec)