Is this supposed to be the true delay of Barrage and Dragon Strike

Actually, the skill data does contain speed values. Here they are:
Level 1: -1 Speed
Level 2: -1 Speed
Level 3: -1 Speed
Level 4: -1 Speed
Level 5: -1 Speed
Level 6: -1 Speed
Level 7: -1 Speed
Level 8: -1 Speed
Level 9: -1 Speed
Level 10: -1 Speed
Level 11: -2 Speed
Level 12: -2 Speed
Level 13: -2 Speed
Level 14: -2 Speed
Level 15: -2 Speed
Level 16: -2 Speed
Level 17: -2 Speed
Level 18: -2 Speed
Level 19: -2 Speed
Level 20: -2 Speed

Nothing surprising.

EDIT: If you have the ability to, you can find where I got the values by looking under Speed Infusion and under each level the speed change is under the "x" value.

I was talking about speed values for attacking skills, not speed infusion. Read, pls.