Depends on the two in question, but generally false. The Wirbelwind, a GV, can kill an aircraft before the aircraft even knows it is there. I have had it happen to me since the icons were shortened and I don't exactly play a lot.
I would be very curious what the K/D ratio of the perk tanks and Wirbelwinds would be without the effect of the concrete sitters. Right now the Tiger II has, by far, the highest K/D ratio of any unit.
We're talking GV's as a group, not specific units. A wirby can only provide even semi-reliable defense out to about D1000, and even then I personally never had any problems getting through. Hell, I've gotten 8 kills in a Ju-88 by dive bombing from high alt to avoid flackers. Granted I salvoed off 10 50kg bombs from each aircraft, but I still put all 10 of those bombs within 50yds of my target. One kill with one salvo of 10, 3 with another, and then 2 kills with a 500kg, a miss, 1kill and 1kill for a total of eight.
While I admit this was before the GV icon range changes, I still didn't need the icons to identify targets. I knew which side of the line the friendlies would be on, and there was a clearly defined line between the two. Even if there weren't, I would have simply dropped on targets further behind the line.
People imagine that you need to have that big flourecent icon above an enemy's head in order to kill it. In a tank, I could generally have picked out who was friendly and who was enemy even without the icon; you can tell by their movment, their actions, their possition, and their direction of fire.
Oak and semp, you're still ignoring what I'm saying. Upping a perk tank already entails more risk than upping a perk fighter of the same price. Concrete sitting is just the GV version of the pick and run, or ack hugging tactic. Quite litterally, you're proposing the equivelant of penalizing aircraft for not furballing.
And in addition, removing the ability to concrete sit for perk tanks will have unintended consequences, ones that even hard core anti-GV'ers like Krusty or High-Tone wouldn't want to happen.
Let me put it this way; I have 6 years of expierence with Aces High, and in those 6 years, I've had a lot of play time doing all the jobs, even bomb****ing, though I'm not real proud to say it. When I say GV'ers have it rough, I'm not just speaking from the GV'ing perspective, I'm speaking from the bomb**** perspective as well.
How many of you are speaking from not only the same depth of expiereince? Not more than a few unless I miss my guess.