Can Cynoches warszewiczii get really big?

[SG in CR]

I found a person selling Cynoches near me an went yesterday to see what they had. He had a row of huge plants that he claimed were C. warszewiczii. The p-bulbs were all 12" to 18" long and up to about 1 1/2" in diameter, far larger than I thought that species could get. He showed me some pictures of the flower which was similar to what C. warszewiczii looks like. Further investigation last night shows that C. ventricosum is also native to Costa Rica and has flowers that are similar to C. warszewiczii. He was asking around $40-50, which was a bit pricey for me. My question is, is really possible for C. warszewiczii to get that big? Or is the seller just mistaken on the ID.