I don't think so and something to aim for. Look at the strava times for that hill and you'll see I'm dead last. I have always been a slow climber, even when I was younger, fitter and lighter, I was still slow. I don't train to get faster on hills, I just train to have enough endurance to keep going and to recover after the effort. After 30 odd years of cycling I know precisely what i can and can't do and it's why I have a triple. I don't use it very often but Saturday was one of those days. Just kick it into a comfortable gear, find a rhythm and wind your way up. It's 30 minutes of effort and there's nothing steeper than that last kicker into Llandudno or up to the chippy, so if you can do that, you can do the climb you just need to train for sustaining the effort and the hills around West Kirby and Thurstaston would do for practise, they're what I use. Although I didn't this time. I was thinking I should've have done as I wound my way up.
I have a route that I was using last year on my way home from work, which included some fairly steep, albeit short climbs in the Birkenhead/New Brighton area, so you don't even have to travel to the West Kirby area to get to decent climbs, in fact I'd argue that these are at least as hard as any there.
@mike3121 all the climbs below are a bit hard and a couple of them are absolute leg burners that will hurt. If you can get up them all then you can do the hilly route. The nice thing about some of them being relatively close to each other is that you can really stretch yourself, and most of them have bail out points so you can stop if it's too hard.
Atherton Street in New Brighton (up past the station) - this is a fairly steady climb, averaging about 7% but the bit after the second junction is around 12%.
Broadheath Avenue (bidston hill) - Hard to actually get onto (from Beechwood Drive) but it's a wall, about 15% or so for the last half.
Beryl Road - I usually do this after Broadheath, roll down the hill to Upton, then up Beryl Road, it's not particularly steep, but it is steady and goes on for a little bit.
Boundary Road - Also on Bidston Hill, so you can join it up with Beryl Road and Broadheath for funzies.
Argyle St South, Birkenhead - Follow the road to the top and take the last left, and then follow the curve around to the top. It's fun.
Holt Hill - Any of the roads up to the top of Holt Hill off the Old Chester Road - most of them are pretty steep especially at the start, so be in the right gear or fall off.
I've got quite a few more that I've found, but these are the ones I enjoy and keep doing. Although the Wirral is pretty flat, there are plenty of short sharp ramps that you can do to get used to doing hills, for example if you can get all of these you can do the hilly route without worry.