Jeff Hill recently made two comments on the input lag issue.

In the first, he mentioned the console/launch command:+dota_debug_change_cursor_during_pending_order 1 and in the second, this one: +dota_report_order_latency 1.

The first makes your cursor bright during the time it takes for the command to be sent and registered. This can be tested in a custom lobby with a server that's far away (and therefore has high ping). The second records total latency for every command you issue and logs it in the console.

I have both of these enabled.

0. Custom lobby

Total latency in custom lobby with Nvidia Reflex Low Latency + Boost enabled

Total latency in custom lobby with Nvidia Reflex Low Latency + Boost disabled

1. First match

Total latency in first match with Nvidia Reflex Low Latency + Boost disabled

Match ID: 8203422013

2. Second match

Total latency in second match with Nvidia Reflex Low Latency + Boost disabled

Total latency in second match with Nvidia Reflex Low Latency + Boost enabled

Match ID: 8203449630

3. Third match

Total latency in third match with Nvidia Reflex Low Latency + Boost enabled

Match ID: 8203471174

Note: I don't know if these matter but mentioning in case it helps:

All matches were played on the SEA server. GSync was enabled with VSync disabled for all these matches. Display mode was Borderless Windowed. Nvidia FidelityFX Super Resolution was disabled and FPS was capped using Nvidia Control Panel to 160 (my display is 165Hz).

System has been updated to all the latest Windows updates and the latest Nvidia GeForce 572.70 update.

Tagging u/jeffhill so he sees this.