Debatable, but I think it makes sense for Sorcerers not to have access to spells with long casting times. It could be justified by saying that those spells are too intricate to spontaneously arise from in-born magical powers.
This has a bit of merit. I just looked up the available cast times for sorcerer in the handbook and elemental evil. Sorcerers have access to the following spells with long cast time.
Mending: 1 minute
Clairvoyance: 3rd, 10 minutes.
Creation: 5th, 1 minute
Teleportation circle 5th, 1 minute.
However, that does give note that a sorcerer is at capable of casting at least a few complicated ritualistic-ish spells, like the teleport circle. But for flavour, a sorcerers teleport circle could be unorthodox, outside what a wizard would consider 'proper.'.