This! (OOPS, quoting the above post about Epcot being the worst didn't work! SORRY!)
We were there for 15 days at Christmas time and five days in mid-May.
It always varied...but EP was hands-down the worst. About 20 minutes on average in December. It just felt like 45 minutes as you were really packed in. It can't be worse than that...
Most times the other parks lines moved quickly, occasionally/rarely could be as long as 15 minutes.
My three daughters always got checked for their multiple varieties of itty-bitty cell phone holders.
We tired to just have my husband carry my epi-pen to avoid it, and he always seemed to get pegged...old, fat white-guys are always breaking the rules, so we sent him ahead in the no bags line, and we got through about the same time.
You really can't avoid it.
And, the major reason it went slowly, is that folks were not ready and taking ridiculous amounts of stuff in multiple bags with tons of pockets they didn't have open or multiple shopping bags. I was always amazed.