Not true.

You could send an extra long var by doing this:

bset -t &t 1 $str(a,4000)
bset -t &t $calc($bvar(&a,0) + 1) $str(a,4000)
bset -t &t $calc($bvar(&a,0) + 1) $str(a,4000)
bset -t &t $calc($bvar(&a,0) + 1) $str(a,4000)
sockwrite sockname &t