Let me preface the following, by letting you know, I'm not trying to be argumentative. :)

I should also note; that I'm speaking from a *BSD box. So this might explain differences.

'nuff said.
So my experiences seem to be a bit different. For example. My last log entry (somewhat abreviated):

:8090 tcpflags 0x2<SYN>; tcp_input: Connection attempt to closed port
[download]

I cant speak for Linux, or OSX, for that matter (altho OSX uses BSD). But at least on BSD, it seems like I could get that sort of information. I'll look a bit deeper, and see if I can get the kind of output the OP's looking for.

--Chris

#!/usr/bin/perl -Tw
use Perl::Always or die;
my $perl_version = (5.12.5);
print $perl_version;

All interesting info. None of it is the current depth of the listenq. I suppose you could use a kernel debugger and find it, but the current number of "connections waiting for the accept() call" isn't in lsof, /proc, netstat, etc.

In this case (the OP). There is no argument.

I did some more investigation, and in doing so. Remembered I had tuned my kernel ( via sysctl) in such a way. That I receive more information, than is normally generated. Frankly, I haven't any idea whether it's even possible on Linux, and am quite sure, unavailable in Windows.
D'OH!

++ to you, kschwab. Apologies for the noise.

--Chris

#!/usr/bin/perl -Tw
use Perl::Always or die;
my $perl_version = (5.12.5);
print $perl_version;