Some Math by Matt on All Clash in comments on Archer Tower update article
All Clash - "Clash of Clans Christmas Update Sneak Peek 3 – Faster Archer Towers" - Matt's Math Comment
So, I did an in-depth analysis on the Current AT vs New AT vs X-Bow on time to kill. With the assumption that all shots hit their mark (which is a big assumption, but roll with it), the new Archer Tower will out-perform the X-Bow in all instance analyzed sans one (Barbarians level 6). I looked at all AT and X-Bow levels against Level 5,6,7 Archers and Barbarians. I also assumed that the first shot was instantaneous (time 0). Assuming you have Maxxed both AT’s and X-Bows, the following times to kill 5 troops of the same kind are as follows:
Archers 5:
AT old – 4 seconds
AT new – 2 seconds
X-Bow – 2.432 seconds
Archers 6:
AT old – 4 seconds
AT new – 2 seconds
X-Bow – 3.072 seconds
Archers 7:
AT old – 4 seconds
AT new – 2 seconds
X-Bow – 3.072 seconds
Barbarians 5:
AT old – 4 seconds
AT new – 4.5 seconds
X-Bow – 6.272 seconds
Barbarians 6:
AT old – 9 seconds
AT new – 7 seconds
X-Bow – 6.912 seconds
Barbarians 7:
AT old – 9 seconds
AT new – 7 seconds
X-Bow – 8.192 seconds
With this taken into account, the only benefits of the X-Bow are the larger range (marginally larger if Ground & Air, much larger Ground Only, but useless against air troops), and a higher probability of hitting a live target (faster shooting and faster projectile speed).