Do I really take that long?

We'd stopped at a gas station in the middle of a long drive home from a day trip out of town, and I was looking forward to getting something cold to drink to combat the summer heat. I took Poodleface over to use the grass before we went inside. The man behind the counter immediately told me to take my dog back outside. "It's a service dog," I told him, pointing to the jacket. He crossed his arms and glared. "We only allow seeing eye dogs."

"Service dogs are allowed everywhere. It's federal law. I have his ID card if you want to see it," I offered in the bland tone I usually adopt when arguing service dog policy. He shook his head sternly at me, but didn't object when Poodleface and I headed for the neon RESTROOMS sign. 

I'd seen an ice cream cooler by the window and was envisioning myself eating a popsicle, but when I looked they didn't have any of the brands I usually buy. I took one out and started reading the ingredients list.

"Look." said the man, sounding very annoyed, "Is there something I can help you find?"

I looked up from the list. "I have severe food allergies," I told him, "I have to read this."

"Oh, do you?"

I chose not to answer that and went back to the list. It checked out okay, so I put it on the counter and reached for my money while I waited for him to ring it up. He didn't, opting to hold it hostage while he interrogated me a little more.

"What kind of service does that dog do?"

"Medical alert."

"Which means what?"

I gave the popsicle a pointed look. He scanned it, accepted my money, but withheld the change. I took a deep breath.

"A medical alert dog accompanies a person with a hidden disability and alerts them if they're going to have an attack or need medical treatment. Seizure dogs are medical alert dogs."

He studied me for a few seconds. "Do you have seizures?"

I don't even tell people who aren't rude insensitive gits why I have Poodleface because so many of them decide I've found a clever loophole and exploited it to get a pet with a VIP pass, so I simply held out my hand for my change, which I got ten seconds later when he realized he couldn't make me say anything else. 

I went back out to the car with my popsicle, thinking about what a jerk he was and how I hate people like him, when I realized that maybe I had been taking a little too long to read the popsicle. How long do normal people take, anyway?

I do that while I'm shopping too, although for things I buy every time I just flip them over and briefly scan the list, not really taking the time to study it in-depth. Do I annoy other shoppers? Does it look strange? I'd never realized anyone might consider it abnormal.

What do you think? Do you ever read things before you buy them?