There is no way to validate this, but with the huge crypto boom in December its not just related to XRP but crypto in general, ALOT of new signups are still pending. I know individuals who have been waiting weeks now to get validated.
This is why I believe Coinbase will not add XRP until they get the necessary infrastructure to handle the increased traffic. There was a post on twitter some time back about a individual that attended Coinbase's Christmas party and mentioned a lot of the employee where talking about XRP getting added. I have no way to know if this is true, but to me it would make sense that they would add a top 3 crytpo just imagine the revenues they could generate.. seems silly that they will not add it eventually.