Can anyone confirm if you can W then E someone as Taliyah for added damage?

During the "reveal" stream on the twitch leaguecommunity account, I recall them specifically mentioning that you could not.

The reasoning for this was to the effect of wanting let the opponent know they needed to dodge this W because it will cause E damage where you may not try as hard to dodge if there is no E. If you were allowed to do it in the other order, you could theoretically fish with W until it looked like you would hit, then cast E only when it would maximize damage.

There seems to be a cast time/animation lock until the W pops before you can cast another spell. Personally, I noticed this most when I was trying to E-W-Q and wondering why the Q wasn't going off.