I agree with Nigel on the age discrimination part of it - that still exists. However that isn't the fault of the OU in anyway at all.

Funnily enough I asked them about the success rate of 18-24 year olds on their courses. They couldn't provide me with exact details on that but did state that 18-25 was their fastest growing age group. I'm 20 and doing a Law degree as I said.
Any pecking order that may or may not exist globally is always flawed anyway. I doubt that a Law degree from Dodgy Dave's Uni for example would beat the law degree I hope to get from the OU just because it's "bricks and mortar"
Do the degree and you will be rewarded well for it. Also the OU look after their students pretty well. When I hopefully graduate the university will help me seek out training contracts etc. with solicitors and they are *not* easy to get. It's a top quality university as student satisfaction - and ranking tables - show. If it wasn't, I wouldn't bother giving 'em thousands to do this Law malarkey. I'm only 20 - I could quite easily go to Manchester Uni and get it done there. But I hope to finish my degree in 5 years and by then I'll have 7 years IT experience, plus a law degree from a well respected Uni. No brainer.
Also worth noting that the quality of these bricks and mortar universities. Oxford, yes, fair enough. But they're not all like that. Hell no.
I'm a happy student of theirs and will continue to study with them until "it's done".