have you tried AAA games on it? I haven't seen much about people playing full walk throughs of rdr2. that's the one holding me back from purchasing this!
Depending on if you're using WiFi or the Ethernet adapter. I have 1gig speed so for me, "Dying light 2" on wifi took around 1 hour, on Ethernet took about 20-ish minutes.
I know I noticed that too. I just wanted to show others the difference in speeds since not every one has every game installed on PC that they want to play on the steam deck.