The smoke has a long delay to allow you to move from B House to B Apps before the smoke starts.

Nade Time till goes off : 9.5 seconds
Smoke fade: 27 seconds after throw

Nade Ranking (stars are rated as 5 is the worst and 0 is the best, so the more stars the more challenge/time/difficulty/risk)

Setup Time: ★☆☆☆☆ (approx. 3-4 seconds)
Practice till Flawless execute: ★☆☆☆☆ (approx. 2-3 attempts till you can hit it regularly)
Cost of Failure: ★☆☆☆☆ (Creates a small gap or goes off map)
Throw Difficulty: ★☆☆☆☆ (Very easy to aim once learned)

Nade Overall Rating: ★Beginner★
|| Beginner- Someone who has uses utility rarely ||