Time to finish a bottle

Hi all! So my little one (5 months) takes 160ml average each bottle. She normally takes about 20 mins to finish one maybe even longer on size 1 teats. She didn’t seem to be fussing but I thought out of curiosity I would try a size 2 teat. She didn’t struggle or splutter and took it really nicely but the only thing is it only took her 10 mins to drink and now I’m wondering if that’s too fast? What size teats are you using and how quick does your baby finish their bottles?