As of the time of this posting, ElYusubov has been a Programmers.SE member for 59 days. Yet he has accumulated over 7600 in reputation.
Is this a record pace?
No. He is not even in the top 20.
The following is a query ranking our top users by Average Reputation Per Day. Here is the top 20 users by that measure.
Pierre 303 56
Péter Török 54
Thorbjørn Ravn Andersen 46
Robert Harvey 41
Mason Wheeler 38
Thomas Owens 36
Steven A. Lowe 35
Jeff O 33
Jerry Coffin 31
Anna Lear 29
The Data Explorer tool is not real time production data. It is a limited subset of a snapshot at a specific point in time. It looks like the last time the Data Explorer was refreshed was back in July, meaning that it will exclude some of ElYusubov's busiest weeks in his short time here.
To rephrase, he may NOW be in the top 20, but we won't be able to find out until the next Data Explorer update :)
I don't know.
You can use the Data Explorer to analyse historical data to see how this compares to other users in the past.