I don't know if anybody else figured this out, but I was looking at a lot of posts and in other forums about it because I wanted to change it myself. I saw a lot of things about adding in all these events and a lot of other complicated stuff. I was playing around with the script editor and found a much simpler way of changing it...
To change the amount of time the title screen takes to fade in, go to the script editor and find 'Scene_Title' on the left. Scroll down to lines 66 and 67.
It looks like this....
66 # Execute transition
67 Graphics.transition <------
By adding in a number of frames inside parentheses at the end of line 67, you can change how long the title screen takes to fade in. For example...
66 # Execute transition
67 Graphics.transition(120) <------