I know it's only preseason, but look at these stats:
In game one Davis returned a kick for 79 yds.
In game 3 he returned 2 kicks for 129 yds. One of those went 109 yds which is as far as you can go. One more yd would have put the kick through the end zone and made it unreturnable.
That's 208 yds in 3 attempts (69.67 yds per return). It's hard to do much better than that.
If he's not Devin Hester, He's at least Dante Hall, isn't he?