Krillin:
During the fight against Chaozu
Chapter: 121, P7.2
Tenshinhan: “What kind of guy is he?...To think that he’d dodge the Dodonpa in that instant, and even launch an attack.â€
Chapter: 121, P14.5
Kame-sennin: “Magnificent…Kuririn’s matured one or two stages…â€
After Goku's fight against Pamput
Chapter: 122, P13.3-7
Kame-sennin: “Panput was truly a fearsomely skilled master, but only when seen from an ordinary level…To your eyes, however, he didn’t look like anything special…That shows just how much you two have acquired strength that surpasses the ordinary.â€
Kuririn: “But…Yamcha lost, and he was about as good as me. And even I had a really tough fight against that runt.â€
Kame-sennin: “There’s no helping that. It’s because your opponents were also super masters who have surpassed the ordinary.â€
Against Goku
Chapter: 125, P3.3
Context: said before he fights Goku
Kuririn: “I’ve trained really hard since then too…I can definitely win! I’m gonna do this!â€
Chapter: 125, P10.4-5
Kuririn: “You’re as fast I’d expect…! When’d you circle behind me?!â€
Goku: “I’m impressed that you managed to dodge that, Kuririn…!â€
Chapter: 126, P4.1-2
Goku: “Amazin’! You’ve gotten better!â€
Kuririn: Hihhih! Are you surprised?â€
Goku: “I’ve never had such a fun fight! I’m really excited!â€
Yamcha:
Chapter: 117, P7.3-5, 8.1
Context: The first round of the 22nd tournament began with a ferocious exchange of blows!
Kuririn: “Wh-whoa…!â€
Goku: “They’re both amazing--!â€
Announcer: “Wh-wh-what happened?!! All that action…and so fast…!!!â€
Yamcha (thinking): “I…I never imagined he’d be so good…â€
Tenshinhan (thinking): “Interesting… Evidently he wasn’t just full of hot air after all… It’s been some time since I encountered such formidable resistance…â€
What grabs me the most is the fact that Goku gives praise for something he thought Krillin couldn't dodge. At some point Krillin also says Yamcha is about even with him.