qw(l i s t) vs (l, i, s, t)

[Tor Hildrum]

Not sure if this belongs here, but anyway:

[hildrum:~] tor% perl -e '@ARGV = qw(1 2); if(scalar(@ARGV)==qw(2 3) ) 
{print "yes\n"}'
yes
[hildrum:~] tor%

[hildrum:~] tor% perl -e '@ARGV = qw(1 2); if(scalar(@ARGV)==(2, 3) ) 
{print "yes\n"}'
[hildrum:~] tor%

&&

[hildrum:~] tor% perl -e '@ARGV = qw(1 2 3); if(scalar(@ARGV)==(2, 3) ) 
{print "yes\n"}'
yes
[hildrum:~] tor%

[hildrum:~] tor% perl -e '@ARGV = qw(1 2 3); if(scalar(@ARGV)==qw(2 3) ) 
{print "yes\n"}'
[hildrum:~] tor%

Could someone please explain what is happening here?
I came across it, and had a hard time trying to figure out what was 
going on.

Tor