Enjoying a leisurely lunch is not a bad thing. The question to ask yourself is, "What does the amount of time I spend eating tell me?"
"I'm not really paying attention to my food. I read the news and lose track of time."
"I'm eating a lot more food than I thought. I just can't eat it all in 15 minutes."
"I'm worried about following the BLL rules. I want to get it 'right.'"
(You make your own rules about what matters.)
YOUR answer should tell you something. Does it?
It's not important that you eat for 14 minutes or 25 minutes. The point is to feed yourself--both your body and your mind--feel satisfied, and give yourself credit.