And my point was that I've been using Vespid in my lists for over a year and they aren't as fragile as he is making them out to be. I rarely only get to shoot with them for a single round, it's almost always two rounds of shooting, sometimes more depending on how my opponent reacts to them. Truth be told, a fair number of opponents choose to ignore them and focus on the "much more powerful" crisis and broadside teams, letting the Vespid get in another round or two
Having run vespid I can say that even a marine unit weakened by vespid shooting (assuming 11 vespid, 6.5 marines (if they have no cover) rounding down to 6) can wipe them. 4 double tapping bolters would kill 3 vespid, flamer (assuming 4-5 hits) could kill 2-3 vespid, missile launchers (assuming 2 hits) would kill about 1 vespid. So 6-7 dead vespid. Or they could fire their pistols and charge (they'd win). And this is if the sergeant doesn't throw his grenade and decides to fire his bolter instead.
So you see this is tipped heavily in the marine's favour.
A ten strong marine unit would likely wipe the vespid, getting roughly 10 kills in one round of shooting. And they can shoot before you even have range.