Recently, after the patch/server downtime on your 24th of May, and just before it, I have had 10-15s lag spikes, latency drops (the screen clears to just me, with a wrench, or not me at all, on the blue-fade-to-sand-orange gradient), and outright drops where I am fully disconnected from the game.
I did not have these problems before the second-to-latest patch, networking, framerate, or otherwise. After the latest patch, they got worse.
EDIT: How do you want me to gather data to address this?