I agree. I just tried and when the app hadn't synced in several weeks then it took about 75 seconds to open. After this (and also after restarting the phone) it opens in about 14 seconds on my Z3 Compact.
If you just want to quickly jot down inbox items then I recommend setting up the IFTTT-app (recipe to use for example gmail to send an email with your note in the topic to Evernote) as a widget on your homescreen to email yourself tasks quickly. I use that a lot for getting things off my mind.