Universal Monster Rules about SLA says:
Using all other spell-like abilities is a standard action unless noted otherwise, and doing so provokes attacks of opportunity.
"all other" refers to those not constant SLA here.
Now lets say the SLA is simulating a spell that normally has 1 round casttime, like Summon Monster or Summon Swarm. Does that count as "otherwise noted" or are those actually able to be summoned as a standard action?
Using all other spell-like abilities is a standard action unless noted otherwise
You have it right there in your quote. SLA>some spells.