My '00 1900SR has the 4.3 v-6 and always seems to have enough power. But add more than 4 people and gear and getting on plane comes slower, especially if they are in the back. However, I would be much more concerned about an out of tune engine impacting your performance. May be as simple as a plug wire fell off, I have had this happen.
If you want to see a significant reduction on time to get get on plane, get yourself a set of smart tabs (www.nauticusinc.com
). Added them to my boat and saw a big improvement.