IMHO - I think generally babies are ready for solids before 6 months and if they could speak they would be thoroughly pissed off with the World Health Organisation who dictate this nonsense and change their mind routinely depending on the weather....
When my DD1 (now nearly 8) was a baby we were told to start her on solids at four months - and she actually started refusing feeds from me because she was ready for the tattie soup and steak and chips
Last year when I had DD2, we were advised to wait til 6 months, but our HV secretly said to us, 'just do what you feel she's ready for' cos she also thought 6 months was late. And around five months, when she started arsing around with the breastfeeds, I started her on solids and was just fine.
Conversely (and I am NOT saying there is necessarily a link here, just a thought) my fiend who had her first child last year, did as she was told, waited til her DD was 6months and struggled like mad to get the bairn to put weight on and eat enough. She felt that she was showing signs of being ready for solids before that but was worried her system wouldn't cope. She's still dinky now, but I don't think that is necessarily to do with waiting, I think that's just the way she is. But my point is, it was a lot harder for her to get going.
Bottom line - I'd let your baby dictate. (Although I can also understand the putting it off cos you can be arsed mashing food all the time! ) Good luck!