In answer to the ops question, yes it is.
When I first did old and was very new to it all I was surprised to find much older men messaging me, when I said I wanted someone closer to my own age they often replied with age is just a number.
Really? Then message someone your own age.
I also refused to engage with anyone who hadn't written about themselves.
I'm sorry but unless you are physically beautiful, which was never the case, then unless you put the effort in I'm not interested.
I had a few men just say 'hi' then when I didn't respond, say something like ' hi, are you ok?'
Err yes I am but I want someone who's interesting and can hold an intelligent conversation.
The ones who said they'd fill their profile in later were given a wide berth.
Anyone I wasn't attracted to was avoided, often I'd reply with a polite you're not what I'm looking for but good luck. Most took this well but a couple got arsey asking why they weren't my type and why couldn't I give them a chance.
Id never reply as I don't believe they could take the truth that I don't want to date them.
There were also the illiterate ones, who couldn't understand what between the ages of X and y means.
Or I want someone who lives within X miles of me.
Or I dislike a, b and c so please don't message me if your into that.
Also the ones who at 50 years old are undecided if they want any more children. Err no if you unsure by that age your not for me.