37 days later:
It was a quiet month Only 487 new good reports, 0 bad, 3 unhandled.

I did cry for my badge, no result

I did also some reports but one thing I deem necessary is to reduce the waiting time spam between two reports. Right now, I have 11 seconds of waiting time and get this message all the time. I can understand we need it between posts to reduce spammer’s comments for bumping services and so on, but since Merit is received for Jr. Member and you can’t rank up just by activity I hope this limit between reports can be reduced or removed.
It’s so time consuming sometimes even it’s only 11 seconds for me right now.

Here are my stats, 0 bad reports 

In my experience, unhandled reports are for "hard to decide" posts and for reports about "famous" members.
If reports are for basic spam they are handled quite fast (under 1 day).

I have been doing a decent amount of reporting where I see it fit.

OMG, I'll never be able to reach you! How many you report per day??

Looks like I’m a novice reporter compared to some of you guys ——->

You have reported 659 posts with 99% accuracy (642 good, 10 bad, 7 unhandled). Do not worry about your accuracy too much; one accurate report is worth many inaccurate reports.

Had somebody tried to repeat his report? (when the report is unhandled for past several days)

Edit :
Here is my report btw

I haven't done that on purpose. I've sometimes sent a "sorry, that was a mistake due to new information" a bit later (marked as good), or the accident double report (sometimes marked as good, sometimes marked as bad).

If it's unhandled, I wouldn't worry about it. I have 248 of those.

Report Statistic for January 2019 !