I agree with equus123,
I also rowed Division 1 in college for 4 years and I lifted for over 7 years. I lifted for other sports such as swimming, track, running, and especially rowing and I lifted competitively for a short time. There is a definate difference in lifting for another sport and different sports (i.e, lifting for swimming is very different than lifting for rowing) and lifting as a competitor. They differ in the focused muscle groups, the amount being lifted both number of times a week and weight and reps and kinds of lifts. I remember for swimming we would focus on the smaller shoulder muscle groups and do lighter weights for more reps and for rowing, the legs were the focus with heavy weight, low rep. I know that for rowing, those who could lift heavy on their squat test (deep squats where the hips went below 90 degrees without the knees going over the ankles) also scored well on their erg test and rowed in the top seats of the team, both for long distances and short.
This being said, I think lifting can have a definate positive for cyclists, whether you're a high performance cyclist or a commuter or a century rider or whatever. It's just what's being lifted, how often, and what's being focused on that's key. But, I'm not a coach or a sports specialist, I'm just an athelete who has experienced different forms of training and experienced the results, both good and bad.