I ran a test on Logos 3:
I searched for "David" in all unlocked Bibles and the return was 37,629 in 70 seconds.
In Logos 4:
I searched for "David" in All Bibles and the return was 37,275 in 70 seconds. But in the line above the search results it reported "0.54 Secs"
If Logos 4 is what it is said to be there is something wrong somewhere!